Zaloguj się

Gotowe bibliografie tematyczne / Poly(anhydride esters) / Artykuły w czasopismach

Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: Poly(anhydride esters).

Artykuły w czasopismach na temat „Poly(anhydride esters)”

Autor: Grafiati

Data publikacji: 6 września 2023

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Sprawdź 50 najlepszych artykułów w czasopismach naukowych na temat „Poly(anhydride esters)”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Przeglądaj artykuły w czasopismach z różnych dziedzin i twórz odpowiednie bibliografie.

1

Snyder, Sabrina S., Yue Cao i Kathryn E. Uhrich. "Extrudable salicylic acid-based poly(anhydride-esters) for injectable drug releasing applications". Journal of Bioactive and Compatible Polymers 34, nr 2 (marzec 2019): 178–89. http://dx.doi.org/10.1177/0883911519834808.

Pełny tekst źródła

Streszczenie:

Injectable biomaterials have attracted more and more interest owing to their advantages over traditional open surgeries: minimal invasive procedure and ease of handling. Commonly used synthetic injectable polymers exhibited low drug loading and poor biodegradability. In this work, we describe a novel series of degradable copolymers comprising salicylic acid–based poly(anhydride-esters) and poly(ethylene glycol) subunits suitable for injectable drug releasing applications. By tuning the rheology properties, these salicylic acid–based poly(anhydride-esters) and poly(ethylene glycol) copolymers may function as injectable drug delivery vehicles that deliver salicylic acid at the injury site. These copolymers were designed to have glass transition temperatures (Tg) below 0ºC, resulting in extrudable polymers that behave like viscous fluids at room temperature. Salicylic acid–based poly(anhydride-esters) and poly(ethylene glycol) copolymers of different ratios (2:1, 1:1, and 1:2 salicylic acid–based poly(anhydride-esters) and poly(ethylene glycol)) were synthesized and characterized by nuclear magnetic resonance and Fourier-transform infrared spectroscopies. Their shear viscosities were determined both at room and physiological temperatures. The in vitro drug release profiles, cytotoxicity, and anti-inflammatory activities were assessed. The shear viscosities were found to compare favorably with current injectable barrier materials on the market.

Style APA, Harvard, Vancouver, ISO itp.

2

Schmeltzer, Robert C., Theodore J. Anastasiou i Kathryn E. Uhrich. "Optimized Synthesis of Salicylate-based Poly( anhydride-esters)". Polymer Bulletin 49, nr 6 (1.03.2003): 441–48. http://dx.doi.org/10.1007/s00289-003-0123-6.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

3

Carbone, Ashley L., MinJung Song i Kathryn E. Uhrich. "Iodinated Salicylate-Based Poly(anhydride-esters) as Radiopaque Biomaterials". Biomacromolecules 9, nr 6 (czerwiec 2008): 1604–12. http://dx.doi.org/10.1021/bm8000759.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

4

Schmeltzer, Robert C., Kristine E. Schmalenberg i Kathryn E. Uhrich. "Synthesis and Cytotoxicity of Salicylate-Based Poly(anhydride esters)". Biomacromolecules 6, nr 1 (styczeń 2005): 359–67. http://dx.doi.org/10.1021/bm049544+.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

5

deRonde, Brittany M., Ashley L. Carbone i Kathryn Uhrich. "Storage stability study of salicylate-based Poly(anhydride-esters)". Polymer Degradation and Stability 95, nr 9 (wrzesień 2010): 1778–82. http://dx.doi.org/10.1016/j.polymdegradstab.2010.05.008.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

6

Schmeltzer, Robert C., i Kathryn E. Uhrich. "Synthesis and characterization of antiseptic-based poly(anhydride-esters)". Polymer Bulletin 57, nr 3 (21.04.2006): 281–91. http://dx.doi.org/10.1007/s00289-006-0561-z.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

7

Prudencio, Almudena, Jonathan J. Faig, MinJung Song i Kathryn E. Uhrich. "Phenolic Acid-based Poly(anhydride-esters) as Antioxidant Biomaterials". Macromolecular Bioscience 16, nr 2 (1.10.2015): 214–22. http://dx.doi.org/10.1002/mabi.201500244.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

8

Carbone, Ashley L., i Kathryn E. Uhrich. "Design and Synthesis of Fast-Degrading Poly(anhydride-esters)". Macromolecular Rapid Communications 30, nr 12 (11.05.2009): 1021–26. http://dx.doi.org/10.1002/marc.200900029.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

9

Lv, Li, Yuanyuan Shen, Min Li, Xiaofen Xu, Mingna Li, Shengrong Guo i Shengtang Huang. "Novel 4-Arm Poly(Ethylene Glycol)-Block-Poly(Anhydride-Esters) Amphiphilic Copolymer Micelles Loading Curcumin: Preparation, Characterization, and In Vitro Evaluation". BioMed Research International 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/507103.

Pełny tekst źródła

Streszczenie:

A novel 4-arm poly(ethylene glycol)-block-poly(anhydride-esters) amphiphilic copolymer (4-arm PEG-b-PAE) was synthesized by esterization of 4-arm poly(ethylene glycol) and poly(anhydride-esters) which was obtained by melt polycondensation ofα-,ω-acetic anhydride terminated poly(L-lactic acid). The obtained 4-arm PEG-b-PAE was characterized by1H-NMR and gel permeation chromatography. The critical micelle concentration of 4-arm PEG-b-PAE was 2.38 μg/mL. The curcumin-loaded 4-arm PEG-b-PAE micelles were prepared by a solid dispersion method and the drug loading content and encapsulation efficiency of the micelles were 7.0% and 85.2%, respectively. The curcumin-loaded micelles were spherical with a hydrodynamic diameter of 151.9 nm. Curcumin was encapsulated within 4-arm PEG-b-PAE micelles amorphously and released from the micelles, faster in pH 5.0 than pH 7.4, presenting one biphasic drug release pattern with rapid release at the initial stage and slow release later. The hemolysis rate of the curcumin-loaded 4-arm PEG-b-PAE micelles was 3.18%, which was below 5%. The IC50value of the curcumin-loaded micelles against Hela cells was 10.21 μg/mL, lower than the one of free curcumin (25.90 μg/mL). The cellular uptake of the curcumin-loaded micelles in Hela cell increased in a time-dependent manner. The curcumin-loaded micelles could induce G2/M phase cell cycle arrest and apoptosis of Hela cells.

Style APA, Harvard, Vancouver, ISO itp.

10

Faig, Jonathan J., Kervin Smith, Alysha Moretti, Weiling Yu i Kathryn E. Uhrich. "One-Pot Polymerization Syntheses: Incorporating Bioactives into Poly(anhydride-esters)". Macromolecular Chemistry and Physics 217, nr 16 (23.06.2016): 1842–50. http://dx.doi.org/10.1002/macp.201600115.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

11

Journal, Baghdad Science. "Synthesis of Novel N-Substituted Dimethylmaleimidyl Esters and Their Applications as Plasticizers for Poly(Vinyl Chloride)". Baghdad Science Journal 4, nr 4 (2.12.2007): 628–34. http://dx.doi.org/10.21123/bsj.4.4.628-634.

Pełny tekst źródła

Streszczenie:

Three N-(hydroxylphenyl) dimethylmaleimides were directly prepared in good yields (81-86)% from the reaction of dimethylmaleic anhydride with amino phenols. The prepared imides were esterified to the corresponding benzoates, methacrylates and cinnamates via their reaction with different acid chlorides in the presence of triethylamine. The prepared esters were tested as plasticizers for PVC via preparing of thirty six samples of PVC with the prepared esters in certain weight ratio followed by recording their softening points. Comparison the results with the universal plasticizers for PVC (DOP) and (DBP) indicated that the prepared esters in general have high plasticizing efficiency.

Style APA, Harvard, Vancouver, ISO itp.

12

Prudencio, Almudena, Robert C. Schmeltzer i Kathryn E. Uhrich. "Effect of Linker Structure on Salicylic Acid-Derived Poly(anhydride−esters)". Macromolecules 38, nr 16 (sierpień 2005): 6895–901. http://dx.doi.org/10.1021/ma048051u.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

13

Erdmann, L., i K. E. Uhrich. "Synthesis and degradation characteristics of salicylic acid-derived poly(anhydride-esters)". Biomaterials 21, nr 19 (październik 2000): 1941–46. http://dx.doi.org/10.1016/s0142-9612(00)00073-9.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

14

Whitaker-Brothers, Kenya, i Kathryn Uhrich. "Investigation into the erosion mechanism of salicylate-based poly(anhydride-esters)". Journal of Biomedical Materials Research Part A 76A, nr 3 (1.03.2006): 470–79. http://dx.doi.org/10.1002/jbm.a.30356.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

15

Harten, Robert D., David J. Svach, Robert Schmeltzer i Kathryn E. Uhrich. "Salicylic acid-derived poly(anhydride-esters) inhibit bone resorption and formationin vivo". Journal of Biomedical Materials Research Part A 72A, nr 4 (15.03.2005): 354–62. http://dx.doi.org/10.1002/jbm.a.30184.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

16

Kaplan, Matay, Michael Ciesielski, Sabine Fuchs, Christoffer Getterle, Frank Schönberger i Rudolf Pfaendner. "Novel Macromolecular and Biobased Flame Retardants Based on Cellulose Esters and Phosphorylated Sugar Alcohols". Polymers 15, nr 15 (27.07.2023): 3195. http://dx.doi.org/10.3390/polym15153195.

Pełny tekst źródła

Streszczenie:

The increasing demand to provide sustainably produced plastic materials requires, a.o., the development of biobased flame retardants (FRs) for applications where flame retardancy is essential. To meet those challenging new sustainability requirements, a set of novel phosphorus-containing cellulose esters were synthesized by an efficient two-step procedure. In the first step, cellulose was treated with acrylic anhydride to synthesize acrylate-functionalized cellulose esters—more specifically, cellulose acrylate butyrate (CeAcBu) and propionate (CeAcPr). Subsequently, phosphorylated anhydro erythritol (PAHE), synthesized from the sugar alcohol erythritol, was added to the acrylate-functionalized cellulose esters via Phospha-Michael addition. For comparison a cellulose ester based on 6H-Dibenzo[c,e][1,2]oxaphosphorin-6-on (DOPO) was prepared analogously. The acrylate-functionalized cellulose esters and novel FRs were characterized by NMR spectroscopy. TGA investigations of PAHE-functionalized CeAcBu revealed an onset temperature of decomposition (2% mass loss) of approx. 290 °C. The novel PAHE-based FR was incorporated into a polypropylene-polyethylene copolymer (PP-co-PE) together with poly-tert-butylphenol disulfide (PBDS) (8 wt.%/2 wt.%) as a synergist. The PP-PE samples achieved V2 classification in the UL 94 V test. In addition, specimens of a rapeseed oil-based polyamide containing PAHE-functionalized CeAcBu at 20 wt.% loading yielded a V2 rating with short burning times.

Style APA, Harvard, Vancouver, ISO itp.

17

Bien-Aime, Stephan, Weiling Yu i Kathryn E. Uhrich. "Pinosylvin-Based Polymers: Biodegradable Poly(Anhydride-Esters) for Extended Release of Antibacterial Pinosylvin". Macromolecular Bioscience 16, nr 7 (13.04.2016): 978–83. http://dx.doi.org/10.1002/mabi.201500454.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

18

Mutthineni, Ramesh Babu. "Role of salicylic acid base poly anhydride esters (SAPAE) in periodontitis and periimplantitis". IP International Journal of Periodontology and Implantology 8, nr 2 (15.06.2023): 59–60. http://dx.doi.org/10.18231/j.ijpi.2023.012.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

19

Faig, Jonathan J., Sarah Klein, Michelle A. Ouimet, Weiling Yu i Kathryn E. Uhrich. "Attenuating Oxidative Stress Via Oxalate Ester-Containing Ferulic Acid-Based Poly(anhydride-esters) that Scavenge Hydrogen Peroxide". Macromolecular Chemistry and Physics 217, nr 1 (4.12.2015): 108–14. http://dx.doi.org/10.1002/macp.201500411.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

20

Kim, Youngmi, i Kathryn E. Uhrich. "Synthesis and characterization of 5-aminosalicylic acid based poly(anhydride-esters) by solution polymerization". Journal of Polymer Science Part A: Polymer Chemistry 48, nr 24 (3.11.2010): 6003–8. http://dx.doi.org/10.1002/pola.24381.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

21

Demirdirek, Bahar, i Kathryn E. Uhrich. "Physically crosslinked salicylate-based poly (N-isopropylacrylamide-co-acrylic acid) hydrogels for protein delivery". Journal of Bioactive and Compatible Polymers 33, nr 2 (3.08.2017): 224–36. http://dx.doi.org/10.1177/0883911517721070.

Pełny tekst źródła

Streszczenie:

Physically crosslinked hydrogels were developed via solvent casting methods using a temperature-sensitive polymer, poly( N-isopropylacrylamide- co-acrylic acid), and a therapeutic polymer, salicylate-based poly(anhydride-esters), to concurrently release salicylic acid and bovine serum albumin in a sustained manner. The physical interactions between the two polymer systems were confirmed using Fourier transform infrared spectroscopy. The crosslinked polymers were porous, thus able to encapsulate bovine serum albumin (23 wt%) and then released the protein in a sustained fashion over 96 h. Concurrently, the hydrogel releases salicylic acid in a sustained manner up to 120 h. Hydrogel systems were cytocompatible at relevant therapeutic concentrations. These hydrogel systems can be used for simultaneous delivery of salicylic acid and protein to achieve synergic effects.

Style APA, Harvard, Vancouver, ISO itp.

22

Schmeltzer, Robert C., Michelle Johnson, Jeremy Griffin i Kathryn Uhrich. "Comparison of salicylate-based poly(anhydride-esters) formed via melt-condensation versus solution polymerization". Journal of Biomaterials Science, Polymer Edition 19, nr 10 (styczeń 2008): 1295–306. http://dx.doi.org/10.1163/156856208786052362.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

23

Stebbins, Nicholas D., Weiling Yu i Kathryn E. Uhrich. "Linear, Mannitol-Based Poly(anhydride-esters) with High Ibuprofen Loading and Anti-Inflammatory Activity". Biomacromolecules 16, nr 11 (14.10.2015): 3632–39. http://dx.doi.org/10.1021/acs.biomac.5b01088.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

24

Dasgupta, Queeny, Sahitya Movva, Kaushik Chatterjee i Giridhar Madras. "Controlled release from aspirin based linear biodegradable poly(anhydride esters) for anti-inflammatory activity". International Journal of Pharmaceutics 528, nr 1-2 (sierpień 2017): 732–40. http://dx.doi.org/10.1016/j.ijpharm.2017.06.065.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

25

Johnson, Michelle L., i Kathryn E. Uhrich. "Concurrent release of admixed antimicrobials and salicylic acid from salicylate-based poly(anhydride-esters)". Journal of Biomedical Materials Research Part A 91A, nr 3 (1.12.2009): 671–78. http://dx.doi.org/10.1002/jbm.a.32288.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

26

Carbone-Howell, Ashley L., Nicholas D. Stebbins i Kathryn E. Uhrich. "Poly(anhydride-esters) Comprised Exclusively of Naturally Occurring Antimicrobials and EDTA: Antioxidant and Antibacterial Activities". Biomacromolecules 15, nr 5 (17.04.2014): 1889–95. http://dx.doi.org/10.1021/bm500303a.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

27

URTTI, A. "Pilocarpine release from matrices of alkyl half-esters of poly(vinyl methyl ether/maleic anhydride)". International Journal of Pharmaceutics 26, nr 1-2 (wrzesień 1985): 45–55. http://dx.doi.org/10.1016/0378-5173(85)90199-1.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

28

Jašek, Vojtěch, Jan Fučík, Lucia Ivanová, Dominik Veselý, Silvestr Figalla, Ludmila Mravcova, Petr Sedlacek, Jozef Krajčovič i Radek Přikryl. "High-Pressure Depolymerization of Poly(lactic acid) (PLA) and Poly(3-hydroxybutyrate) (PHB) Using Bio-Based Solvents: A Way to Produce Alkyl Esters Which Can Be Modified to Polymerizable Monomers". Polymers 14, nr 23 (1.12.2022): 5236. http://dx.doi.org/10.3390/polym14235236.

Pełny tekst źródła

Streszczenie:

The polyesters poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB) used in various applications such as food packaging or 3D printing were depolymerized by biobased aliphatic alcohols—methanol and ethanol with the presence of para-toluenesulphonic acid (p-TSA) as a catalyst at a temperature of 151 °C. It was found that the fastest depolymerization is reached using methanol as anucleophile for the reaction with PLA, resulting in the value of reaction rate constant (k) of 0.0425 min−1 and the yield of methyl lactate of 93.8% after 120 min. On the other hand, the value of constant k for the depolymerization of PHB in the presence of ethanol reached 0.0064 min−1 and the yield of ethyl 3-hydroxybutyrate was of 76.0% after 240 min. A kinetics study of depolymerization was performed via LC–MS analysis of alkyl esters of lactic acid and 3-hydroxybutanoic acid. The structure confirmation of the products was performed via FT-IR, MS, 1H NMR, and 13C NMR. Synthesized alkyl lactates and 3-hydroxybutyrates were modified into polymerizable molecules using methacrylic anhydride as a reactant and potassium 2-ethylhexanoate as a catalyst at a temperature of 80 °C. All alkyl esters were methacrylated for 24 h, guaranteeing the quantitative yield (which in all cases reached values equal to or of more than 98%). The methacrylation rate constants (k′) were calculated to compare the reaction kinetics of each alkyl ester. It was found that lactates reach afaster rate of reaction than 3-hydroxybutyrates. The value of k′ for themethacrylated methyl lactate reached 0.0885 dm3/(mol·min). Opposite to this result, methacrylated ethyl 3-hydroxybutyrate’s constant k′ was 0.0075 dm3/(mol·min). The reaction rate study was conducted by the GC-FID method and the structures were confirmed via FT-IR, MS, 1H NMR, and 13C NMR.

Style APA, Harvard, Vancouver, ISO itp.

29

Stebbins, Nicholas D., Michelle M. Moy, Jonathan J. Faig i Kathryn E. Uhrich. "Sugar-based poly (anhydride-ester) containing natural antioxidants and antimicrobials: Synthesis and formulation into polymer blends". Journal of Bioactive and Compatible Polymers 32, nr 2 (17.10.2016): 196–208. http://dx.doi.org/10.1177/0883911516664819.

Pełny tekst źródła

Streszczenie:

Thymol, a naturally occurring antioxidant and antimicrobial, is commonly researched for active packaging applications to deter food spoilage and bacterial growth. However, the high temperature necessary for processing often volatilizes the thymol, reducing its utility. To overcome this processing limitation, sugar-based poly(anhydride-esters) comprising thymol and compounds generally regarded as safe (succinic and tartaric acid) were successful prepared via mild solution polymerization methods. In vitro release studies demonstrated a sustained thymol release over 3 weeks at therapeutically relevant concentrations. Furthermore, the released thymol displayed antioxidant and antimicrobial activities as indicated by a 2,2-diphenyl-1-picrylhydrazyl radical scavenging and Kirby–Bauer disk diffusion assays, respectively. High-temperature melt blending with low-density polyethylene revealed that the chemical incorporation of thymol into a polymer backbone overcame volatility issues and maintained relevant bioactivity.

Style APA, Harvard, Vancouver, ISO itp.

30

Rojas-Lema, Sandra, Jordi Arevalo, Jaume Gomez-Caturla, Daniel Garcia-Garcia i Sergio Torres-Giner. "Peroxide-Induced Synthesis of Maleic Anhydride-Grafted Poly(butylene succinate) and Its Compatibilizing Effect on Poly(butylene succinate)/Pistachio Shell Flour Composites". Molecules 26, nr 19 (30.09.2021): 5927. http://dx.doi.org/10.3390/molecules26195927.

Pełny tekst źródła

Streszczenie:

Framing the Circular Bioeconomy, the use of reactive compatibilizers was applied in order to increase the interfacial adhesion and, hence, the physical properties and applications of green composites based on biopolymers and food waste derived lignocellulosic fillers. In this study, poly(butylene succinate) grafted with maleic anhydride (PBS-g-MAH) was successfully synthetized by a reactive melt-mixing process using poly(butylene succinate) (PBS) and maleic anhydride (MAH) that was induced with dicumyl peroxide (DCP) as a radical initiator and based on the formation of macroradicals derived from the hydrogen abstraction of the biopolymer backbone. Then, PBS-g-MAH was used as reactive compatibilizer for PBS filled with different contents of pistachio shell flour (PSF) during melt extrusion. As confirmed by Fourier transform infrared (FTIR), PBS-g-MAH acted as a bridge between the two composite phases since it was readily soluble in PBS and could successfully form new esters by reaction of its multiple MAH groups with the hydroxyl (–OH) groups present in cellulose or lignin of PSF and the end ones in PBS. The resultant compatibilized green composites were, thereafter, shaped by injection molding into 4-mm thick pieces with a wood-like color. Results showed significant increases in the mechanical and thermomechanical rigidity and hardness, meanwhile variations on the thermal stability were negligible. The enhancement observed was related to the good dispersion and the improved filler-matrix interfacial interactions achieved by PBS-g-MAH and also to the PSF nucleating effect that increased the PBS’s crystallinity. Furthermore, water uptake of the pieces progressively increased as a function of the filler content, whereas the disintegration in controlled compost soil was limited due to their large thickness.

Style APA, Harvard, Vancouver, ISO itp.

31

Rosenberg, L. E., A. L. Carbone, U. Römling, K. E. Uhrich i M. L. Chikindas. "Salicylic acid-based poly(anhydride esters) for control of biofilm formation in Salmonella enterica serovar Typhimurium". Letters in Applied Microbiology 46, nr 5 (maj 2008): 593–99. http://dx.doi.org/10.1111/j.1472-765x.2008.02356.x.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

32

Huang, Peng-Yang, Chen-Yang Huang, Jia-Wun Li, Sheng-Yen Shen, Chih-Chia Cheng, Chih-Wei Chiu, Ru-Jong Jeng i Jiang-Jen Lin. "Immobilization of Air-Stable Copper Nanoparticles on Graphene Oxide Flexible Hybrid Films for Smart Clothes". Polymers 14, nr 2 (7.01.2022): 237. http://dx.doi.org/10.3390/polym14020237.

Pełny tekst źródła

Streszczenie:

Through the use of organic/inorganic hybrid dispersants—which are composed of polymeric dispersant and two-dimension nanomaterial graphene oxide (GO)—copper nanoparticles (CuNPs) were found to exhibit nano stability, air-stable characteristics, as well as long-term conductive stability. The polymeric dispersant consists of branched poly(oxyethylene)-segmented esters of trimellitic anhydride adduct (polyethylene glycol−trimethylolpropane−trimellitic anhydride, designated as PTT). PTT acts as a stabilizer for CuNPs, which are synthesized via in situ polymerization and redox reaction of the precursor Cu(CH3COO)2 within an aqueous system, and use graphene oxide to avoid the reduction reaction of CuNPs. The results show that after 30 days of storage the CuNPs/PTT/GO composite film maintains a highly conductive network (9.06 × 10−1 Ω/sq). These results indicate that organic/inorganic PTT/GO hybrid dispersants can effectively maintain the conductivity stability of CuNPs and address the problem of CuNP oxidation. Finally, the new CuNPs/PTT/GO composite film was applied to the electrocardiogram (ECG) smart clothes. This way, a stable and antioxidant-sensing electrode can be produced, which is expected to serve as a long-term ECG monitoring device.

Style APA, Harvard, Vancouver, ISO itp.

33

Janowska-Renkas, Elżbieta. "Hydrophilicity as a measure of the efficiency of the superplasticisers". Budownictwo i Architektura 12, nr 3 (11.09.2013): 169–76. http://dx.doi.org/10.35784/bud-arch.2029.

Pełny tekst źródła

Streszczenie:

This paper presents the results of chemical structural investigations of four new-generation superplasticizers (denoted here as SP-A through SP-M2) used in concrete production engineering. The commercial product samples, the gel permeation chromatography (GPC) and the Fourier-Transformed Infrared Spectroscopy (FTIR) test methods were applied to the research. The effect of superplasticizers on the rheological properties of cement pastes was tested. The performance of a superplasticizer, i.e. the reduction of plastic viscosity, was demonstrated to be enhanced by: hydrophilicity of the SP polymer –understood as the ratio of hydrophilic ethers to hydrophobic esters in the polymer chain, SP polymer content in the bulk of the commercial product sample, weight-average molecular weight (Mw) of the SP polymer. The above relations were confirmed for the studied superplasticizers– the derivatives of: acrylic acid (SP-A1 and SP-A2) and maleic acid (SP-M2 and SP-M1). The efficiency of superplasticizers was found to decrease with the contents of the free poly(ethylene glycols) (PEGs) which remained unreacted with acids and/or anhydride. The superplasticizers based on the maleic anhydride derivatives (SP-C and SP-D) proved to be more efficient and to slow down the hydration process to a much higher extent than the superplasticizers – acrylic acid derivatives (SP-A1 and SP-A2).

Style APA, Harvard, Vancouver, ISO itp.

34

Keefe, Genny E., Jean-d'Amour K. Twibanire, T. Bruce Grindley i Michael P. Shaver. "Poly(lactic acid) polymer stars built from early generation dendritic polyols". Canadian Journal of Chemistry 91, nr 6 (czerwiec 2013): 392–97. http://dx.doi.org/10.1139/cjc-2012-0471.

Pełny tekst źródła

Streszczenie:

A family of polymer stars has been prepared from early generation dendritic cores with four, six, and eight arms. Four dendritic cores were prepared from the sequential reaction of a multifunctional alcohol with a protected anhydride, followed by deprotection to afford two or three new alcohol functionalities per reactive site. These cores were used as initiators for the tin-catalyzed ring-opening polymerization of l-lactide and rac-lactide to afford isotactic and atactic degradable stars, respectively. Two series of stars were prepared for each monomer, either maintaining total molecular weight or number of monomer units per arm. The polymers were characterized by NMR spectroscopy, light-scattering gel-permeation chromatography, differential scanning calorimetry, and thermogravimetric analysis. Our results support previous work that suggests that the length of the arms dictates thermal properties rather than the total molecular weight of the star. Little effect was noted between aromatic and aliphatic cores, presumably due to the flexibility of the rest of the core molecule. We have shown that early generation dendrimers can serve as excellent core structures for building core-first polymer stars via the ring-opening of cyclic esters.

Style APA, Harvard, Vancouver, ISO itp.

35

Deka, Barasha, Rohit Sharma i Vikas Mahto. "Synthesis and performance evaluation of poly (fatty esters-co-succinic anhydride) as pour point depressants for waxy crude oils". Journal of Petroleum Science and Engineering 191 (sierpień 2020): 107153. http://dx.doi.org/10.1016/j.petrol.2020.107153.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

36

Bryers, James D., Rebecca A. Jarvis, Jason Lebo, Almudena Prudencio, Themis R. Kyriakides i Kathryn Uhrich. "Biodegradation of poly(anhydride-esters) into non-steroidal anti-inflammatory drugs and their effect on Pseudomonas aeruginosa biofilms in vitro and on the foreign-body response in vivo". Biomaterials 27, nr 29 (październik 2006): 5039–48. http://dx.doi.org/10.1016/j.biomaterials.2006.05.034.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

37

Zhou, Yu, Guofei Chen, Wei Wang, Liping Song i Xingzhong Fang. "Comparative study of transparent polyimides derived from bis(ether anhydride)s and bis(ester anhydride)s using 2,2′-bis(trifluoromethyl)biphenyl-4,4′-diamine". High Performance Polymers 29, nr 2 (28.07.2016): 218–26. http://dx.doi.org/10.1177/0954008316636182.

Pełny tekst źródła

Streszczenie:

Two series of polyimides (PIs) derived from bis(ether anhydride)s and bis(ester anhydride)s using 2,2′-bis(trifluoromethyl)biphenyl-4,4′-diamine were synthesized via solution polycondensation. The poly(ether imide)s could be formed by the conventional one-step method, while the poly(ester imide)s were only afforded by the two-step procedure. The resulting PIs had glass transition temperatures ( Tgs) in the range of 224–320°C and exhibited good mechanical properties with tensile strength in the range of 80.5–96.5 MPa, tensile moduli 2.7–6.9 GPa, and elongations at break 1.5–17.3%. It was found that the PIs derived from bis(ether anhydride)s showed higher thermal stability, better solubility, and transparency but lower Tg and higher water absorption compared with bis(ester anhydride)-based PIs due to the different ether and ester linkages.

Style APA, Harvard, Vancouver, ISO itp.

38

Journal, Baghdad Science. "Biodegradation Studies in Vitro of Novel Poly(adipic anhydride-co-mannitol)-N-maleoyl Chitosan Networks". Baghdad Science Journal 13, nr 2 (5.06.2016): 210–20. http://dx.doi.org/10.21123/bsj.13.2.210-220.

Pełny tekst źródła

Streszczenie:

In this work, novel copolymers of poly(adipic anhydride-co-mannitol) were synthesized by melting condensation polymerization of poly(adipic anhydride) with five percentages of mannitol sugar, 1 to 5 Wt.%. These copolymers were purified and then, characterized by FT-IR, which was proved that the cross-linking reaction was caused by nucleophilic attack of mannitol hydroxyl group to acidic anhydride groups of poly(adipic anhydride) backbone and new ester groups were formed and appeared. Also, modified organic-soluble chitosan, N-maleoyl-chitosan, were synthesized by grafting reaction of chitosan with maleic anhydride in DMF as solvent, and it was also purified and characterized by FT-IR. Biodegradation in vitro of the IPNs of poly(adipic anhydride-co-mannitol)-N-maleoyl chitosan networks were evaluated by hydrolytic degradation studies at three different media (PBS, SIF and SGF) for 18 weeks with 92% as maximum degradation and it was found that minimum weight loss of IPNs was noticeably shown in SIF. In addition, hydrolytic degradation percent was decreased with increasing mannitol proportions.

Style APA, Harvard, Vancouver, ISO itp.

39

Lin, Shao Jian, Jian Wu Lan, Si Die Wu i Si Chen. "Research on Structure and Properties of a Novel Type of Poly( Ester-Imide)". Advanced Materials Research 332-334 (wrzesień 2011): 231–34. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.231.

Pełny tekst źródła

Streszczenie:

A diacid monomer was prepared from trimellitic anhydride and aminobenzoic acid,and a novel poly(ester-imide) was synthesized through the diacid monomer and the 1, 4-butanediol.The structure and chemical resistance, intrinsic viscosity and thermal property and crystallization of the poly(ester -imide) were characterized by FT-IR spectra,various organic solvents,a capillary Ubbelohde viscometer,differental scanning calorimetry (DSC) and thermogravimetric analysis (TGA) and crystallization rate instrument.The results showed that the poly(ester-imide) has excellent chemical resistance and thermal property,its intrinsic viscosity is 0.46dL/g,it has high glass transition temperature (Tg) and relatively low melting temperature (Tm).Moreover,the novel poly(ester-imide) has obvious crystallization and excellent property to spin into fibers.

Style APA, Harvard, Vancouver, ISO itp.

40

Haim-Zada, Moran, Arijit Basu, Tal Hagigit, Ron Schlinger, Michael Grishko, Alexander Kraminsky, Ezra Hanuka i Abraham J. Domb. "Alternating Poly(ester-anhydride) by Insertion Polycondensation". Biomacromolecules 17, nr 6 (26.05.2016): 2253–59. http://dx.doi.org/10.1021/acs.biomac.6b00523.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

41

Krasko, Michal Y., Aviva Ezra i Abraham J. Domb. "Lithocholic-acid-containing poly(ester-anhydride)s". Polymers for Advanced Technologies 14, nr 11-12 (listopad 2003): 832–38. http://dx.doi.org/10.1002/pat.403.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

42

Alejo, T., B. Martín-García, M. D. Merchán i M. M. Velázquez. "QDs Supported on Langmuir-Blodgett Films of Polymers and Gemini Surfactant". Journal of Nanomaterials 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/287094.

Pełny tekst źródła

Streszczenie:

Different LB films of poly(octadecene-co-maleic anhydride), PMAO, poly(styrene-co-maleic anhydride) partial 2 butoxy ethyl ester cumene terminated, PS-MA-BEE, and Gemini surfactant ethyl-bis(dimethyl octadecylammonium bromide), 18-2-18, have been used to study the effect of the substrate coating on the surface self-assembly of CdSe quantum dots (QDs). Results show that all the “coating molecules” avoid the 3D aggregation of QDs observed when these nanoparticles are directly deposited on mica. Different morphologies were observed depending on the molecules used as coatings, and this was related to the surface properties, such as wetting ability, and the morphology of the coating LB films.

Style APA, Harvard, Vancouver, ISO itp.

43

Ji, He-Yuan, Dong-Po Song, Bin Wang, Li Pan i Yue-Sheng Li. "Organic Lewis pairs for selective copolymerization of epoxides with anhydrides to access sequence-controlled block copolymers". Green Chemistry 21, nr 22 (2019): 6123–32. http://dx.doi.org/10.1039/c9gc02429h.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

44

Kučera, Miloslav, Dušan Kimmer, Karla Majerová i Josef Majer. "Reactions of macroions with ester and carboxylic groups of polymers". Collection of Czechoslovak Chemical Communications 52, nr 9 (1987): 2194–203. http://dx.doi.org/10.1135/cccc19872194.

Pełny tekst źródła

Streszczenie:

In the reaction of dianions with poly(methyl methacrylate), only an insignificant amount of insoluble crosslinked product is obtained. If, however, the concentration of grafting dianions approaches that of ester groups, the amount of poly(methyl methacrylate) which may thus be crosslinked becomes quite significant. Dications, too, can bring about crosslinking of only an insignificant number of poly(methyl methacrylate) chains. Carboxylic groups in poly(acrylic acid) react with dianions and dications in an anhydrous medium similarly to ester groups. On the other hand, in the presence of a cocatalytic amount of water dications are more readily bound to carboxylic groups, forming a covalent bond. The relatively highest efficiency was observed in the bond formation between dication and the poly[styrene-alt-(maleic anhydride)], both in an anhydrous medium and in the presence of H2O.

Style APA, Harvard, Vancouver, ISO itp.

45

Domb, Abraham J., i Robert Langer. "Solid-state and solution stability of poly(anhydrides) and poly(esters)". Macromolecules 22, nr 5 (wrzesień 1989): 2117–22. http://dx.doi.org/10.1021/ma00195a018.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

46

Faÿ, Fabienne, Isabelle Linossier, Valérie Langlois i Karine Vallée-Rehel. "Biodegradable Poly(ester-anhydride) for New Antifouling Coating". Biomacromolecules 8, nr 5 (maj 2007): 1751–58. http://dx.doi.org/10.1021/bm061013t.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

47

Storey, Robson F., i Amelia E. Taylor. "Synthesis of Novel Biodegradable Poly(Ester-Anhydride)s". Journal of Macromolecular Science, Part A 34, nr 2 (luty 1997): 265–80. http://dx.doi.org/10.1080/10601329708014954.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

48

Jaszcz, Katarzyna. "Photocrosslinked poly(ester-anhydride) microspheres with macroporous structure". Polymers for Advanced Technologies 24, nr 10 (28.06.2013): 873–80. http://dx.doi.org/10.1002/pat.3159.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

49

Zhang, Zhi Ming, Shi Qian Wei, Ting Ting Li i Li Hua Han. "Synthesis of Poly L-Glutamate Initiated by Triethanolamine". Advanced Materials Research 450-451 (styczeń 2012): 26–29. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.26.

Pełny tekst źródła

Streszczenie:

With L-glutamic acid as raw materials, N-carboxy-L-glutamic acid-benzyl-anhydride (BLG-NCA) was synthesized by triethanolamine. With triethanolamine as the initiator in the anhydrous dichloromethane, ring-opening polymerization of BLG-NCA was initiated, poly-l-glutamic acid benzyl ester was obtained. The amount of initiators, molar ratio of monomer/initiators, reaction temperature and reaction time to the effect of poly-l-glutamic acid benzyl ester in the ring-opening polymerization of BLG-NCA were studied. At last, poly L-glutamate was got, after the debenzylation in HBr solution. Through infrared spectroscopy, Ubbelohde viscometer, 1H NMR spectra, polymerization product was characterized and analysized. Results showed that in dichloromethane, ring-opening polymerization of BLG-NCA could be initiated by triethanolamine.

Style APA, Harvard, Vancouver, ISO itp.

50

Wu, Si Die, Jian Wu Lan, Shao Jian Lin i Si Chen. "Improving Elastic Recovery of Poly( Ester-Ether) Fiber at Lower Temperature with Poly( Ester-Imide)". Advanced Materials Research 332-334 (wrzesień 2011): 327–30. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.327.

Pełny tekst źródła

Streszczenie:

To improve the elastic recovery of common poly(ester-ether) fibers, especially under lower temperatures, an imide dicarboxylic acid was prepared with trimellitic anhydride and aminobenzoic acid firstly, and then series of poly(ester-ether-imide) block copolymer(CPI) were prepared with this imide dicarboxylic acid, terephthalic acid, 1,4-butanediol and polytetrahydrofuran glycol .etc. The stuctures and properties were investigated by FT-IR spectra, differential scanning calorimetry(DSC) and capillary Ubbelohde. It was found that the Tm of the polymer was about 140°C and the intrinsic viscosity was 0.7~0.9dL/g. The CPI copolymers were melting spinning. The draw ratio and test temperature effects to the fibers' elastic recovery were studied. The results showed that stretching is beneficial to the improvement of the elastic recovery; the modified fibers' delayed elastic recovery was above 92% at 28°C and over 95% at lower temperatures of 5°C and -10°C, which is a great improvement to the common poly(ester-ether) fibers'.

Style APA, Harvard, Vancouver, ISO itp.

Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!