Готові списки джерел за темами / Blend Polymer

Добірка наукової літератури з теми "Blend Polymer"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Blend Polymer"

1

Cavanaugh, T. J., K. Buttle, J. N. Turner, and E. B. Nauman. "The study of multiphase polymer-blend morphologies by HVEM." Proceedings, annual meeting, Electron Microscopy Society of America 54 (August 11, 1996): 180–81. http://dx.doi.org/10.1017/s0424820100163368.

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Анотація:
Multiphase polymer blends are important in the polymer industry. Most commercial blends consist of two main polymers combined with a third, compatibilizing polymer, typically a graft or block copolymer. The most common examples are those involving the impact modification of a brittle thermoplastic by the microdispersion of a rubber into the matrix. Recently, a model of ternary polymer blends has provided a wealth of morphologies for examination. Even though this model can give an excellent basis for the design of a polymer blend, experimental verification is necessary. A correlation of blend properties such as impact strength with blend morphology must also be made. The focus is to confirm the predicted morphologies in binary and ternary blends using HVEM.The polymer blends were produced by compositional quenching. In this process, the polymers were dissolved in a solvent. The solution was pumped through a heat exchanger and then flashed across a needle valve to remove the solvent.
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2

Singh, Pradeep, B. R. Venugopal, and Radha Kamalakaran. "Scanning Transmission Electron Microscopy for Polymer Blends." Journal of Modern Materials 4, no. 1 (September 29, 2017): 31–36. http://dx.doi.org/10.21467/jmm.4.1.31-36.

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Physical properties of the polymer can be altered by mixing one or more polymers together also known as polymer blending. The miscibility of polymers is a key parameter in determining the properties of polymer blend. Conventional transmission electron microscopy (CTEM) plays a critical role in determining the miscibility and morphology of the polymers in blend system. One of the most difficult part in polymer microscopy is the staining by heavy metals to generate contrast in CTEM. RuO4 and OsO4 are commonly used to stain the polymer materials for CTEM imaging. CTEM imaging is difficult to interpret for blends due to lack of clear distinction in contrast. Apart from having difficulty in contrast generation, staining procedures are extremely dangerous as improper handling could severely damage skin, eyes, lungs etc. We have used scanning transmission electron microscopy (STEM) to image polymer blends without any staining processes. In current work, Acrylonitrile Butadiene Styrene (ABS)/Methacrylate Butadiene Styrene (MBS) and Styrene Acrylonitrile (SAN) along with filler additive were dispersed on Polycarbonate (PC) matrix and studied by STEM/HAADF (high angle annular dark field). By using HAADF, contrast was generated through molecular density difference to differentiate components in the blend.
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3

Hammani, Salim, Sihem Daikhi, Mikhael Bechelany, and Ahmed Barhoum. "Role of ZnO Nanoparticles Loading in Modifying the Morphological, Optical, and Thermal Properties of Immiscible Polymer (PMMA/PEG) Blends." Materials 15, no. 23 (November 27, 2022): 8453. http://dx.doi.org/10.3390/ma15238453.

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High-performance hybrid polymer blends can be prepared by blending different types of polymers to improve their properties. However, most polymer blends exhibit phase separation after blending. In this study, polymethylmethacrylate/polyethylene glycol (PMMA/PEG) polymer blends (70/30 and 30/70 w/w) were prepared by solution casting with and without ZnO nanoparticles (NPs) loading. The effect of loading ZnO nanoparticles on blend morphology, UV blocking, glass transition, melting, and crystallization were investigated. Without loading ZnO NP, the PMMA/PEG blends showed phase separation, especially the PEG-rich blend. Loading PMMA/PEG blend with ZnO NPs increased the miscibility of the blend and most of the ZnO NPs dispersed in the PEG phase. The interaction of the ZnO NPs with the blend polymers slightly decreased the intensity of infrared absorption of the functional groups. The UV-blocking properties of the blends increased by 15% and 20%, and the band gap energy values were 4.1 eV and 3.8 eV for the blends loaded with ZnO NPs with a PMMA/PEG ratio of 70/30 and 30/70, respectively. In addition, the glass transition temperature (Tg) increased by 14 °C, the crystallinity rate increased by 15%, the melting (Tm) and crystallization(Tc) temperatures increased by 2 °C and 14 °C, respectively, and the thermal stability increased by 25 °C compared to the PMMA/PEG blends without ZnO NP loading.
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4

Sweah, Zainab J., Fatima hameed Malik, and Alyaa Abdul Karem. "Electrical Properties of Preparing Biodegradable Polymer Blends of PVA/Starch Doping with Rhodamine –B." Baghdad Science Journal 18, no. 1 (March 10, 2021): 0097. http://dx.doi.org/10.21123/bsj.2021.18.1.0097.

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Анотація:
This research focuses on the characteristics of polyvinyl alcohol and starch polymer blends doping with Rhodamine-B. The polymer blends were prepared using the solution cast method, which comprises 1:1(wt. /wt.). The polymer blends of PVA and starch with had different ratios of glycerin 0, 25, 30, 35, and 40 % wt. The ratio of 30% wt of glycerin was found to be the most suitable mechanical properties by strength and elasticity. The polymer blend of 1:1 wt ratios of starch/PVA and 30% wt of glycerin were doped with different ratios of Rhoda mine-B dye 0, 1, 2, 3, 4, 5, and 6% wt and the electrical properties of doping biodegradable blends were studied. The ratio of Rhodamine-B 5% wt to the polymer blends showed high conductivity up to 1×10-3. In general, the electrical conductivity was increased with high temperature, which is similar to the behavior of semi-conductive polymers. This work focuses on the characteristics of polymer blend based on starch and polyvinyl alcohol doping with Rhodamine-B. the polymer blends were prepared using the solution cast method, which comprising 1:1(wt./wt.). ratio starch and polyvinyl alcohol and different ratio of glycerin (0, 25, 30, 35,and 40) %. The ratio of 30% of glycerin was found to be the most suitable mechanical properties. The polymer blend of 1:1 starch/PVA and 30%of glycerin were doped with different ratio of Rhoda mine-B dye (0, 1, 2, 3, 4, 5, and 6%) and the electrical properties of doping biodegradable blends were studied. The ratio of Rhodamine-B 5% to the polymer blends was high conductivity up to 1×10-3. In general, the electrical conductivity was increased with high temperature this is similar to the behavior of semi-conductive polymers. This work focuses on the characteristics of polymer blend based on starch and polyvinyl alcohol doping with Rhodamine-B. the polymer blends were prepared using the solution cast method, which comprising 1:1(wt./wt.). ratio starch and polyvinyl alcohol and different ratio of glycerin (0, 25, 30, 35,and 40) %. The ratio of 30% of glycerin was found to be the most suitable mechanical properties. The polymer blend of 1:1 starch/PVA and 30%of glycerin were doped with different ratio of Rhoda mine-B dye (0, 1, 2, 3, 4, 5, and 6%) and the electrical properties of doping biodegradable blends were studied. The ratio of Rhodamine-B 5% to the polymer blends was high conductivity up to 1×10-3. In general, the electrical conductivity was increased with high temperature this is similar to the behavior of semi-conductive polymers.
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5

Hameed, Awham M. "A Study on the Mechanical Properties for Ternary Polymer Blends." Journal of Materials Science Research 6, no. 3 (June 30, 2017): 27. http://dx.doi.org/10.5539/jmsr.v6n3p27.

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In this work, two ternary polymer blends were prepared by mixing EP with (UP/PSR) and (PVC/PSR) respectively. Different mixing ratios were used (5, 10, 15 and 20) wt.% of the added polymers. Impact, tensile, compression, flexural and hardness tests were performed on the prepared blends. The results of testing showed that the first ternary blend A (EP/UP/PSR) records tensile strength values higher than that of the second ternary blend B (EP/ PVC/PSR). At 20wt.% of mixing, the blend B records higher impact strength than that of the blend A. There is large difference in the flexural behavior between A and B blends where the blend A records the highest value of flexural strength (F.S) at (5wt.%) while the blend B records the highest value of (F.S) at (20wt.%). From compression test, it is obvious that the values of compressive strength decrease of blend B more than that of the blend A as well as the same behavior can be obtained through the hardness test.
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6

Gunawardene, Oneesha H. P., Chamila Gunathilake, Sumedha M. Amaraweera, Nimasha M. L. Fernando, Darshana B. Wanninayaka, Asanga Manamperi, Asela K. Kulatunga, et al. "Compatibilization of Starch/Synthetic Biodegradable Polymer Blends for Packaging Applications: A Review." Journal of Composites Science 5, no. 11 (November 16, 2021): 300. http://dx.doi.org/10.3390/jcs5110300.

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The health and environmental concerns of the usage of non-biodegradable plastics have driven efforts to explore replacing them with renewable polymers. Although starch is a vital renewable polymer, poor water resistivity and thermo-mechanical properties have limited its applications. Recently, starch/synthetic biodegradable polymer blends have captured greater attention to replace inert plastic materials; the question of ‘immiscibility’ arises during the blend preparation due to the mixing of hydrophilic starch with hydrophobic polymers. The immiscibility issue between starch and synthetic polymers impacts the water absorption, thermo-mechanical properties, and chemical stability demanded by various engineering applications. Numerous studies have been carried out to eliminate the immiscibility issues of the different components in the polymer blends while enhancing the thermo-mechanical properties. Incorporating compatibilizers into the blend mixtures has significantly reduced the particle sizes of the dispersed phase while improving the interfacial adhesion between the starch and synthetic biodegradable polymer, leading to fine and homogeneous structures. Thus, Significant improvements in thermo-mechanical and barrier properties and water resistance can be observed in the compatibilized blends. This review provides an extensive discussion on the compatibilization processes of starch and petroleum-based polymer blends.
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7

Quitadamo, Alessia, Valerie Massardier, and Marco Valente. "Eco-Friendly Approach and Potential Biodegradable Polymer Matrix for WPC Composite Materials in Outdoor Application." International Journal of Polymer Science 2019 (January 27, 2019): 1–9. http://dx.doi.org/10.1155/2019/3894370.

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Blends based on high-density polyethylene (HDPE) and poly(lactic) acid (PLA) with different ratios of both polymers were produced: a blend with equal amounts of HDPE and PLA, hence 50 wt.% each, proved to be a useful compromise, allowing a high amount of bioderived charge without this being too detrimental for mechanical properties and considering its possibility to biodegradation behaviour in outdoor application. In this way, an optimal blend suitable for producing a composite with cellulosic fillers is proposed. In the selected polymer blend, wood flour (WF) was added as a natural filler in the proportion of 20, 30, and 40 wt.%, considering as 100 the weight of the polymer blend matrix. There are two compatibilizers to modify both HDPE-PLA blend and wood-flour/polymer interfaces, i.e., polyethylene-grafted maleic anhydride and a random copolymer of ethylene and glycidyl methacrylate. The most suitable percentage of compatibilizer for HDPE-PLA blends appears to be 3 wt.%, which was selected also for use with wood flour. In order to evaluate properties of blends and composites tensile tests, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analyses, and infrared spectroscopy have been performed. Wood flour seems to affect heavy blend behaviour in process production of material suggesting that future studies are needed to reduce defectiveness.
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8

Hwang, Do-Hoon, Moo-Jin Park, Suk-Kyung Kim, Nam-Heon Lee, Changhee Lee, Yong-Bae Kim, and Hong-Ku Shim. "Characterization of white electroluminescent devices fabricated using conjugated polymer blends." Journal of Materials Research 19, no. 7 (July 2004): 2081–86. http://dx.doi.org/10.1557/jmr.2004.0261.

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We report the characterization of white light emitting devices fabricated using conjugated polymer blends. Blue emissive poly[9,9-bis(4′-n-octyloxyphenyl)fluorene-2,7-diyl-co-10-(2′-ethylhexyl)phenothiazine-3,7-diyl] [poly(BOPF-co-PTZ)] and red emissive poly(2-(2′-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene) (MEH-PPV) were used in the blends. The inefficient energy transfer between these blue and red light emitting polymers (previously deduced from the photoluminscence (PL) spectra of the blend films) enables the production of white light emission through control of the blend ratio. The PL and electroluminescence (EL) emission spectra of the blend systems were found to vary with the blend ratio. The EL devices were fabricated in the indium tin oxide [poly(3,4-ethylenedioxy-thiophene)-poly(styrenesulfonate)] (ITO/PEDOT-PSS)blend/LiF/Al configuration, and white light emission was obtained for one of the tested blend ratios.
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9

Fanta, Gada Muleta, Pawel Jarka, Urszula Szeluga, Tomasz Tański, and Jung Yong Kim. "Phase Behavior of Amorphous/Semicrystalline Conjugated Polymer Blends." Polymers 12, no. 8 (July 31, 2020): 1726. http://dx.doi.org/10.3390/polym12081726.

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We report the phase behavior of amorphous/semicrystalline conjugated polymer blends composed of low bandgap poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b′]dithiophene) -alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT) and poly{(N,N′-bis(2-octyldodecyl)naphthalene -1,4,5,8-bis(dicarboximide)-2,6-diyl)-alt-5,5′-(2,2′-bithiophene)} (P(NDI2OD-T2)). As usual in polymer blends, these two polymers are immiscible because ΔSm ≈ 0 and ΔHm > 0, leading to ΔGm > 0, in which ΔSm, ΔHm, and ΔGm are the entropy, enthalpy, and Gibbs free energy of mixing, respectively. Specifically, the Flory–Huggins interaction parameter (χ) for the PCPDTBT /P(NDI2OD-T2) blend was estimated to be 1.26 at 298.15 K, indicating that the blend was immiscible. When thermally analyzed, the melting and crystallization point depression was observed with increasing PCPDTBT amounts in the blends. In the same vein, the X-ray diffraction (XRD) patterns showed that the π-π interactions in P(NDI2OD-T2) lamellae were diminished if PCPDTBT was incorporated into the blends. Finally, the correlation of the solid-liquid phase transition and structural information for the blend system may provide insight for understanding other amorphous/semicrystalline conjugated polymers used as active layers in all-polymer solar cells, although the specific morphology of a film is largely affected by nonequilibrium kinetics.
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Ngai, K. L., and C. M. Roland. "Models for the Component Dynamics in Blends and Mixtures." Rubber Chemistry and Technology 77, no. 3 (July 1, 2004): 579–90. http://dx.doi.org/10.5254/1.3547838.

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Abstract Four models for the component dynamics in polymer blends are briefly reviewed, with an emphasis on their ability to describe anomalous segmental relaxation behavior, secondary relaxations in blends, mixtures which include small molecules, and properties in the concentration limits of probe molecules and neat polymers. While general features of the segmental dynamics of polymer blends can be accounted for by all of these models, only that of the authors addresses all these particular aspects of blend dynamics. Our conclusion is that assessment of blend dynamics models should extend beyond intuitive appeal or general properties, with due attention given to the more subtle and exceptional behaviors.
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Дисертації з теми "Blend Polymer"

1

Williams, Peter W. "Polymer blend miscibility." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/14459.

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A number of quasi-binary homopolymer blends have been investigated with regard to their miscibility. The blends consisted of poly(epichlorohydrin) (PEPC) mixed with a range of poly(methacrylate) polymers:- poly(methyl methacrylate); poly(ethoxyethyl methacrylate); poly(tetrahydrofurfuryl methacrylate) and poly(glycidyl methacrylate) (PGMA). It was found that the state of mixing of the systems varied with the structure of the ester side chain, embracing a number of miscibility states. It has been postulated that the observed miscibility in the system PGMA/PEPC is due to the presence of a small specific interaction between the species. A second category of blend investigated comprised of a homopolymer (PEPC) and a random copolymer. In two cases the copolymers (styreneco- methacrylonitrile; methyl methacrylate-co-methacrylonitrile) were chosen such that the cohesive energy density of PEPC lay between those of the comonomers. This led to the observation of a number of miscibility states for the systems, depending upon the copolymer composition. Analysis of these systems and similar examples in the literature was conducted using the mean-field approach. A reasonable accord between theory and experiment was found when the role of both specific interactions and free-volume terms was negligible. A third type of copolymer (glycidyl methacrylate-co-methyl methacrylate) was found to be only partially miscible with PEPC. This was due to the small GMA/PEPC interaction and the tendency of the copolymer to diverge from the copolymerisation equation at high GMA concentrations. The experimental probe for miscibility has been the glass transition temperature. This was determined using Differential Thermal Analysis, Dynamic Mechanical Thermal Analysis and to a lesser extent, Dielectric Relaxation. The phenomenon of partial miscibility, in which phase composition varies with overall blend composition, has been discussed. It has been postulated that this widely observed behaviour is due to a non-equilibrium phase separation process. The inadequacy of existing relationshi in describing the variation of the glass transition temperature of a miscible blend with composition has been highlighted. Furthermore, the importance of the transition width as an indicator of miscibility has been stressed.
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2

Liu, Yee-Chen. "Polymer blend light-emitting diodes." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610709.

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3

Sharudin, Rahida Wati Binti. "Carbon Dioxide Physical Foaming of Polymer Blends:-Blend Morphology and Cellular Structure-." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/161019.

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4

Tuladhar, Sachetan Man. "Charge transport in conjugated polymers and polymer/fullerene Blends : influence of chemical structure, morphology and blend composition." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445260.

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5

Wang, Shiping. "THICKNESS AND CRYSTALLINITY DEPENDENT SWELLING OF POLY (ETHYLENE OXIDE) /POLY (METHYL METHACRYLATE) BLEND FILMS." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1556831245474707.

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6

Rajaram, Sridhar. "Quantitative image analysis and polymer blend coalescence." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ45460.pdf.

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7

Manandhar, Sandeep. "Bioresorbable Polymer Blend Scaffold for Tissue Engineering." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc68008/.

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Tissue engineering merges the disciplines of study like cell biology, materials science, engineering and surgery to enable growth of new living tissues on scaffolding constructed from implanted polymeric materials. One of the most important aspects of tissue engineering related to material science is design of the polymer scaffolds. The polymer scaffolds needs to have some specific mechanical strength over certain period of time. In this work bioresorbable aliphatic polymers (PCL and PLLA) were blended using extrusion and solution methods. These blends were then extruded and electrospun into fibers. The fibers were then subjected to FDA standard in vitro immersion degradation tests where its mechanical strength, water absorption, weight loss were observed during the eight weeks. The results indicate that the mechanical strength and rate of degradation can be tailored by changing the ratio of PCL and PLLA in the blend. Processing influences these parameters, with the loss of mechanical strength and rate of degradation being higher in electrospun fibers compared to those extruded. A second effort in this thesis addressed the potential separation of the scaffold from the tissue (loss of apposition) due to the differences in their low strain responses. This hypothesis that using knit with low tension will have better compliance was tested and confirmed.
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8

Adhikari, Narayan Prasad. "Interfacial properties and phase behavior of unsymmetric polymer blends." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964276852.

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9

Pipich, Vitaliy. "Ordering transition and critical phenomena in a three component polymer mixture of A/B homopolymers and a A-B diblockcopolymer." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97119436X.

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10

Roths, Tobias. "Rheologische Charakterisierung polymerer Materialien statistische Datenanalyse, Modellbildung und Simulation /." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961227508.

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Книги з теми "Blend Polymer"

1

Rajaram, Sridhar. Quantitative image analysis and polymer blend coalescence. Ottawa: National Library of Canada, 1996.

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2

Coveney, Sam. Fundamentals of Phase Separation in Polymer Blend Thin Films. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19399-1.

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3

Smith, Timothy Stephen. Influence of processing on the mechanical properties of a flame retardent filled polymer blend. Uxbridge: Brunel University, 1988.

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4

Efremovich, Zaikov Gennadiĭ, Bouchachenko A. L, and Ivanov V. B, eds. Aging of polymers, polymer blends and polymer composites. New York: Nova Science Publishers, 2002.

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5

Efremovich, Zaikov Gennadiĭ, Bouchachenko A. L, and Ivanov V. B, eds. Aging of polymers, polymer blends, and polymer composites. New York: Nova Science Publishers, 2002.

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6

Functional polymer blends: Synthesis, properties, and performances. Boca Raton: CRC Press, 2012.

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7

Robeson, Lloyd M. Polymer blends: An introduction. Munich: Hanser, 2007.

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8

J, Lohse David, ed. Polymeric compatibilizers: Uses and benefits in polymer blends. Munich: Hanser, 1996.

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9

R, Paul Donald, and Bucknall C. B, eds. Polymer blends. New York: Wiley, 2000.

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R, Paul Donald, and Bucknall C. B, eds. Polymer blends. New York: Wiley, 2000.

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Частини книг з теми "Blend Polymer"

1

Gooch, Jan W. "Polymer Blend." In Encyclopedic Dictionary of Polymers, 563. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9121.

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2

Covas, Jose A., Luiz Antonio Pessan, Ana V. Machado, and Nelson M. Larocca. "Polymer Blend Compatibilization by Copolymers and Functional Polymers." In Encyclopedia of Polymer Blends, 315–56. Weinheim, Germany: Wiley-VCH Verlag & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527805242.ch7.

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3

Robeson, L. M. "Perspectives in Polymer Blend Technology." In Polymer Blends Handbook, 1167–200. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/0-306-48244-4_17.

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4

Hofmann, George H. "Polymer Blend Modification of PVC." In Polymer Blends and Mixtures, 117–48. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5101-3_7.

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5

White, James L., and Sug Hun Bumm. "Polymer Blend Compounding and Processing." In Encyclopedia of Polymer Blends, 1–26. Weinheim, Germany: Wiley-VCH Verlag & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527805242.ch1.

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6

Nayak, Ganesh Chandra, and Chapal Kumar Das. "LCP Based Polymer Blend Nanocomposites." In Liquid Crystalline Polymers, 251–72. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22894-5_8.

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7

Vesely, D. "Practical techniques for studying blend microstructure." In Polymer Blends and Alloys, 103–25. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_5.

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Weinberg, Kerstin, Stefan Schuß, and Denis Anders. "Thermal Diffusion in a Polymer Blend." In Innovative Numerical Approaches for Multi-Field and Multi-Scale Problems, 285–307. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39022-2_13.

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9

Kerres, Jochen. "Blend Concepts for Fuel Cell Membranes." In Polymer Membranes for Fuel Cells, 1–37. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-73532-0_8.

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Mene, Ravindra U., Ramakant P. Joshi, Vijaykiran N. Narwade, K. Hareesh, Pandit N. Shelke, and Sanjay D. Dhole. "Polymeric Blend Nano-Systems for Supercapacitor Applications." In Polymer Nanocomposites in Supercapacitors, 189–220. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003174646-11.

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Тези доповідей конференцій з теми "Blend Polymer"

1

Akhilesan, S., Susy Varughese, and C. Lakshmana Rao. "Electromechanical Behavior of Conductive Polyaniline/Poly (Vinyl Alcohol) Blend Films Under Uniaxial Loading." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-7937.

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Polyaniline (PANI) an electronically conducting polymer, and its charge transfer complexes are interesting engineering materials due to their unique electronic conductivity, electrochemical behavior, low raw material cost, ease of synthesis and environmental stability in comparison with other conjugated polymers. The main disadvantage of PANI is its limited processability. Blending of conducting polymers with insulating polymers is a good choice to overcome the processability problem. In this study a solution-blend method is adopted to prepare conductive polyaniline/polyvinyl alcohol (PANI/PVA) blend films at various blend ratios. Interest in applications for polyaniline (PANI) has motivated investigators to study its electro mechanical properties, and its use in polymer composites or blends with common polymers. The work described here looks at the uniaxial deformation behavior of the conducting polymer films and the anisotropic dependency of electrical conductivity of the blend films exposed to static and dynamic loading conditions. The relation between mechanical strain, electrical conductivity and film microstructure is investigated on PANI/PVA blend films.
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Song, Janice J., Jennifer Kowalski, and Hani E. Naguib. "Synthesis and Characterization of a Bio-Compatible Shape Memory Polymer Blend for Biomedical and Clinical Applications." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7452.

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Shape memory polymers (SMP) are a class of stimuli-responsive materials that are able to respond to external stimulus such as heat by altering their shape. Bio-compatible SMPs have a number of advantages over existing SMP materials and are being studied extensively for biomedical and clinical applications. Polymer blending has proved to be an effective method to improve the mechanical properties of polymers (such as tensile strength and toughness) as well as shape memory properties. In this study, we investigate the effect of blending two bio compatible polymers, thermoplastic polyurethane (TPU), a polymer with a high toughness and percent elongation, and poly-lactic acid (PLA), a stiff and strong polymer. The thermal, mechanical and thermo-mechanical (shape memory) properties of TPU/PLA blends were characterized in the following weight percent compositions: 80/20, 65/35, and 50/50 TPU/PLA. The TPU/PLA SMP blending was achieved with melt-blending and the tensile samples were fabricated with compression molding. The mechanical properties of each blend were studied at three different temperatures. The following thermo-mechanical (or shape memory) properties were also studied at each temperature: the shape fixity rate (Rf), shape recovery rate (Rr) and the effect of recovery temperature on the shape memory behavior. The microstructure of the polymer blends were investigated with an environmental scanning electron microscope (SEM). The results showed that the glass transition temperatures of the blends were similar to pure PLA. The toughness of the SMP blend increased with increasing TPU concentration and the tensile strength of the blend increased with PLA composition. The shape fixity rate of the TPU/PLA blend increased with increasing TPU content and the shape recovery rate increased with increasing deformation and recovery temperature. The various TPU/PLA SMP blends characterized in this study have the potential to be developed further for specific biomedical and clinical applications.
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3

Huang, Han-Xiong, Xiao-Jing Li, and You-Fa Huang. "Morphology Development of Polymer Blend With Different Viscosity Ratios Along an Extruder." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14294.

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The properties of polymer blends are largely determined by their morphology. So it is significant to investigate the morphology development of polymer blends during processing. In this work the morphology development of polymer blend was studied during flow along a single screw extruder. The polymer blend used incorporated polypropylene (PP) as its matrix phase and a high-viscosity or low-viscosity polyamide-6 (PA6) as the disperse phase. The samples of blends were taken from different positions using specially designed sampling device along the extruder online during the processing and were then examined using scanning electron microscopy (SEM). The morphology of the dispersed phase was quantitatively analyzed using image analysis software. The morphology evolution of blends along the melt conveying zone of screw was simulated. Theoretically predicted morphology evolution is in reasonable agreement with the experimental results. The aim of this work is to provide a better insight in the morphology development of blend during processing.
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Breeze, Alison J., Zack Schlesinger, Sue A. Carter, Hans-Heinrich Hoerhold, Hartwig Tillmann, David S. Ginley, and Phillip J. Brock. "Nanoparticle-polymer and polymer-polymer blend composite photovoltaics." In International Symposium on Optical Science and Technology, edited by Zakya H. Kafafi. SPIE, 2001. http://dx.doi.org/10.1117/12.416932.

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Xu, Liang, Iryna Zhuk, and Sofia Sirak. "Novel Modified Polycarboxylate Paraffin Inhibitor Blends Reduce C30+ Wax Deposits in South Texas." In SPE International Conference on Oilfield Chemistry. SPE, 2023. http://dx.doi.org/10.2118/213853-ms.

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Abstract A typical challenge encountered during shale oil and condensate production in South Texas is severe wax deposition on fractured rock surface near the wellbore and flowlines from wellheads to separators, potentially reducing surface areas for oil and gas flow. Commonly used surfactant dispersants and wax inhibitors such as comb shaped polyacrylate/methacrylate (PAMA) and alpha-olefin modified maleic anhydride (OMAC) sometimes fall short and do not always address challenges associated with C30+ waxy crude oil and condensate. This is typically due to the mismatch of molecular weights and the incorrect ratio of polar and non-polar groups between the polymeric additive and the targeted wax species. In this study, we present the findings of a new modified polycarboxylate and polyacrylate blend that provides a balanced approach of optimized non-polar and polar groups on the polymer backbone. Additionally, the inherent long polymer chains with a broad chain density distribution appear to interact well with C30+ waxy compounds, effectively lowering pour point, reducing wax appearance temperature (WAT) and suppressing wax deposition. A gradual reduction of WATs in polymer treated waxy deposit was observed via DSC/CPM measurements when the polymer blends were varied with polyacrylate/methacrylate/modified carboxylate ratios. Cold finger tests were performed at selected temperature differentials that closely represented field conditions in order to demonstrate the efficacy of the optimized blend, in which deposits of C30+ waxy compounds were significantly eliminated. It's commonly accepted that comb shaped polymers interact with wax crystals via incorporation and perturbation. The polymer blend presented here, with an optimized ratio of non-polar and polar groups, appear to enable a secondary mechanism that introduces a repulsive force between growing wax crystals, which is reminiscent of interfacial polarization of charged wax crystals under an external electric field. Through Zeta Potential, Cold Finger, Yield Stress, DSC, SARA and HTGC analysis, it was demonstrated that this additional interference rendered the comb shaped polymer blend much more effective, against other PAMAs, OMACs, and linear polymers such as ethylene vinyl acetate (EVA).
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Hwang, Ho-Sang, Bum-Kyoung Seo, and Kune-Woo Lee. "Strippable Core-Shell Polymer Emulsion for Decontamination of Radioactive Surface Contamination." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40193.

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In this study, the core-shell composite polymer for decontamination from the surface contamination was synthesized by the method of emulsion polymerization and blends of polymers. The strippable polymer emulsion is composed of the poly(styrene-ethyl acrylate) [poly(St-EA)] composite polymer, poly(vinyl alcohol) (PVA) and polyvinylpyrrolidone (PVP). The morphology of the poly(St-EA) composite emulsion particle was core-shell structure, with polystyrene (PS) as the core and poly(ethyl acrylate) (PEA) as the shell. Core-shell polymers of styrene (St)/ethyl acrylate (EA) pair were prepared by sequential emulsion polymerization in the presence of sodium dodecyl sulfate (SDS) as an emulsifier using ammonium persulfate (APS) as an initiator. Related tests and analysis confirmed the success in synthesis of composite polymer. The products are characterized by FT-IR spectroscopy, TGA that were used, respectively, to show the structure, the thermal stability of the prepared polymer. Two-phase particles with a core-shell structure were obtained in experiments where the estimated glass transition temperature and the morphologies of emulsion particles. Decontamination factors of the strippable polymeric emulsion were evaluated with the polymer blend contents.
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SHEN, Y. J., and PETER P. CHU. "PVDF/PHENOLIC BLEND POLYMER ELECTROLYTE." In Proceedings of the 8th Asian Conference. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776259_0040.

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8

Hong, Yifeng, and Donggang Yao. "Formation and Characterization of Co-Continuous Shear Thickening Fluid/Polymer Blends." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63828.

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By synergistically combining distinct physical and chemical properties of different components, co-continuous polymer blending has become an important route to improve the performance of polymeric materials. Shear thickening fluid is a type of non-Newtonian fluid which has unique shear rate dependence and good damping properties. In this work, the authors combined the shear thickening fluid and a commodity polymer into a single system by forming a co-continuous blend via a melt processing technique. The processing window of such co-continuous blend was determined by referring to the thermal and rheological properties of raw materials and experimentally exploring various blending conditions. An increase of tanδ under dynamic mechanical analyzing testing was observed in the co-continuous blend compared with neat polymer as control, which indicated the enhancement of damping capabilities.
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Prakash, Asit, and Monica Katiyar. "White polymer light emitting diode using blend of fluorescent polymers." In 16th International Workshop on Physics of Semiconductor Devices, edited by Monica Katiyar, B. Mazhari, and Y. N. Mohapatra. SPIE, 2012. http://dx.doi.org/10.1117/12.928008.

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Zhang, C., G. Yu, B. Kmbel, and A. J. Heeger. "White electroluminescent diodes from polymer blend." In International Conference on Science and Technology of Synthetic Metals. IEEE, 1994. http://dx.doi.org/10.1109/stsm.1994.836071.

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Звіти організацій з теми "Blend Polymer"

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Yang, Arthur, Roman Domszy, and Jeff Yang. A New Generation of Building Insulation by Foaming Polymer Blend Materials with CO2. Office of Scientific and Technical Information (OSTI), March 2016. http://dx.doi.org/10.2172/1244652.

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Mulkern, Thomas J., Donovan Harris, and Alan R. Teets. Epoxy Functionalized Hyberbranched Polymer/Epoxy Blends. Fort Belvoir, VA: Defense Technical Information Center, December 1999. http://dx.doi.org/10.21236/ada372416.

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Rafailovich, M., and J. Sokolov. Surface and interfacial properties of polymer blends. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/6048397.

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Fabish, T. J., W. F. Lynn, R. J. Passinault, A. Vreugdenhil, and B. Metz. High Performance Flat Coatings Through Compatibilized Immiscible Polymer Blends. Fort Belvoir, VA: Defense Technical Information Center, July 1999. http://dx.doi.org/10.21236/ada375878.

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5

Chu, B. Phase transition in polymer blends and structure of ionomers. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/5362446.

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Anastasiadis, S. H., I. Gancarz, and J. T. Koberstein. Interfacial Tension of Immiscible Polymer Blends: Temperature and Molecular Weight Dependence. Fort Belvoir, VA: Defense Technical Information Center, February 1988. http://dx.doi.org/10.21236/ada192463.

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Naslund, Robert A., and Phillip L. Jones. Characterization of Thermotropic Liquid Crystalline Polymer Blends by Positron Annihilation Lifetime Spectroscopy. Fort Belvoir, VA: Defense Technical Information Center, July 1992. http://dx.doi.org/10.21236/ada253616.

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Datta, A., J. P. De Souza, A. P. Sukhadia, and D. G. Baird. Processing Studies of Blends of Polypropylene with Liquid Crystalline Polymers. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada232961.

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9

Rafailovich, M., and J. Sokolov. Determination of concentration profiles at interfaces and surfaces of partially miscible polymer blends. Office of Scientific and Technical Information (OSTI), April 1993. http://dx.doi.org/10.2172/6583481.

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10

Rafailovich, M., and J. Sokolov. Surface and interfacial properties of polymer blends. Progress report, September 25, 1990--December 24, 1991. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/10107795.

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