Dissertations / Theses on the topic 'Polymer solutions Viscosity'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 32 dissertations / theses for your research on the topic 'Polymer solutions Viscosity.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Huang, Jin. "Extensional viscosity of dilute polymer solutions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0004/MQ46075.pdf.
Full textCarrington, Stephen Paul. "Extensional flow of polymer solutions." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282976.
Full textDindar, Cigdem. "High-pressure viscosity and density of polymer solutions at the critical polymer concentration in near-critical and supercritical fluids." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35720.
Full textMaster of Science
Houzelle, Marie-Christine. "Dérivés amphiphiles associatifs de la pectine diverses voies de synthèse : étude comparative des propriétés physicochimiques des solutions aqueuses en régimes dilué et semi-dilué." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL111N.
Full textLiu, Kun. "Miscibility, Viscosity, Density, and Formation of Polymers in High-Pressure Dense Fluids." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29787.
Full textPh. D.
Bhamidipati, Kanthi Latha. "Detection and elimination of defects during manufacture of high-temperature polymer electrolyte membranes." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43616.
Full textFröbe, Melanie. "Untersuchung der Fluoreszenzlebensdauer von BODIPY-Farbstoffen in Polymerlösungen und Polymerschmelzen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-214934.
Full textMattoussi, Hedi Mohamed. "Contribution a l'etude de polymeres mesomorphes en solutions : etudes statique, dynamique et conformationnelle." Paris 6, 1987. http://www.theses.fr/1987PA066516.
Full textIngremeau, François. "Solutions de polymères sous écoulement : liens entre propriétés microscopiques et manifestations macroscopiques." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00912345.
Full textNasouri, K., A. Haji, A. M. Shoushtari, and A. Kaflou. "A Novel Study of Electrospun Nanofibers Morphology as a Function of Polymer Solution Properties." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35141.
Full textDorenge, Justine. "Etude du comportement d'additifs polymères épaississants dans les huiles moteur." Thesis, Le Mans, 2018. http://www.theses.fr/2018LEMA1012.
Full textThe reduction of car fuel consumption is one of the biggest concerns for oil companies. It involves the reduction of friction between moving parts through the formulation of lubricants.A lubricant is composed of base oil and several additives used to improve the properties of engine oils. Polymeric compounds are used to limit the decrease of viscosity with temperatures to efficiently protect the motor. This type of additives, called Viscosity Index Improver (VII), is based on the swelling of polymer chains with temperature. The most important parameter in the lubricant formulation is the viscosity and its dependance on temperature. The aim of the work was to study the influence of recently developed families of VII additives in different base oils in ordrer to select the most efficient type of polymer for engine lubricant uses, by understanding the molecular mechanisms responsible of the VII behavior. Various polyalkylmethacrylates were investigated to establishing the rheological properties of the solutions, namely as a function of temperature (dependence of intrinsic viscosity). For a given base oil, the efficiency of a VII varies with its chemical structure, its molecular weight and its concentration. Then, tribological properties were investigated using standard tests with the aim to obtain an overview of the lubricant's behavior under pressure. We also considered the degradation of this kind of polymers in a representative test in order to check the performance's durability. Degradation and tribological behaviors were rationalized in terms of volume occupied by polymer chains
Roure, Isabelle. "Rhéologie et dimensions des chaines du hyaluronane en solution." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10227.
Full textWinters, Ian Douglas. "The rheological and structural properties of blends of polyethylene with paraffin wax." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45833.
Full textBiver, Claudine. "Formation d'amas dans les solutions de polymères hydrosolubles : influence sur le comportement en solution d'un polysaccharide végétal : le scléroglucane." Paris 6, 1986. http://www.theses.fr/1986PA066199.
Full textSiochi, Emilie J. "Dilute solution studies of molecular weight distributions of nitrocellulose, modified lignins and PMMA graft polymers." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54423.
Full textPh. D.
Molina, Julien. "Unsaturated polyesters synthesis for low viscosity and styrene-free resins." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R083.
Full textThe unsaturated polyester resins are mainly used in composites materials field. Given the high viscosity of these polyesters, it is necessary to dilute them with a reactive diluent so that the resin can be easily applied. The most commonly used reactive diluent is styrene. Dilution rates are approximately 35-39%. However styrene is labelled CMR and is subject to an exposure limit value as of 1 January 2019.It is therefore necessary to reduce or change the reactive diluent in order to meet the new standards to come. For this purpose, the chemical structure of the polyester must be optimized by compatibilizing the resin with the reactive diluent. In order to understand what governs the viscosity of a polymer in solution, the study of Hansen parameters of unsaturated polyesters was conducted by both theoretical and experimental determination. Twenty polyesters of different chemical structures or molecular weights were synthesized and their Hansen parameters were measured using HSPiP software. The QSPR method was applied to correlate the impact of each monomer used on the Hansen parameters of the polymer. By the same method QSPR, a study of the influence of each monomer on the glass transition temperature of the synthesized polyesters was carried out. The QSPR method gave very satisfactory results. As the viscosity of a polymer in solution is not a multilinear phenomenon it cannot be predicted by QSPR. An innovative method of correlation based on a neural network, has been put in place and has proved suitable. The study of the number of neurons, the number and the quality of the descriptors allowed to develop a relatively reliable viscosity prediction tool with respect to the number of data available for learning the neural network. In addition, the impact of each descriptor on the viscosity is quantified through the neural network. The understanding of these different parameters was used for the development of a less viscous unsaturated polyester resin while retaining equivalent mechanical properties in styrene compared to a 'reference' resin sold in the Mäder group. Different monomers have been used to change the chemical structure of these polyesters. These polyesters were subsequently characterized by SEC, DSC and HR-MS. Solution viscosity and mechanical properties of the crosslinked resins were measured. A resin that is two times less viscous with respect to the reference resin with a similar dilution ratio in styrene has been obtained. This resin is now being industrialized within the Mäder group. In parallel, work has been carried out on the development of a styrene-free resin. In order to make the unsaturated polyesters compatible with alternative monomers, their chemical structure had to be changed in order to allow better crosslinking. Styrene-free and odorless resins have been developed during this thesis
Chagnes, Alexandre. "Propriétés de transport dans les électrolytes concentrés à base de y-butyrolactone : application aux accumulateurs rechargeables au lithium." Tours, 2002. http://www.theses.fr/2002TOUR4019.
Full textSpelling, Victor, Mathias Axelsson, Lovisa Ringström, af Rosenschöld Johanna Munck, and Anton Lindblad. "Mapping the intrinsic viscosityof hyaluronic acid at high concentrations of OH-." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325348.
Full textPezron, Erwoan. "Influence de la complexation d'ions sur les proprietes physico-chimiques de solutions de polymeres." Paris 6, 1988. http://www.theses.fr/1988PA066476.
Full textYilmaz, Faris Sad. "Polyaniline: Synthesis, Characterization, Solution Properties, And Composites." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608598/index.pdf.
Full texts modulus of polyaniline-filled low density polyethylene composites became poorer as polyaniline content increased. Moreover, a sudden increase in the electrical conductivity with increasing polyaniline contents was also observed. The conductivity of the tubular composites of multi wall nanotubes (MWNTs)-filled polyaniline increased with increasing MWNTs loading, and became weakly temperature dependent. The morphological analysis indicated that the MWNTs were well dispersed and isolated, and the tubes became crowded proportionally to MWNTs weight percent used in the composites.
Berriaud, Jouon Nadine. "Contribution à l'étude des propriétés du hyaluronane : comportement rhéologique, hydratation." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10164.
Full textCallet, Françoise. "Influence de la structure, de la conformation et des traitements post fermentation sur les propriétés du xanthane en solution." Grenoble 1, 1987. http://www.theses.fr/1987GRE10120.
Full textLoppinet, Benoit. "Etude de la structure de solutions d'ionomères en solvants polaires par diffusion aux petits angles." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10208.
Full textKheradmand, Houshang. "Contribution a l'etude de la degradation et la stabilisation de polyacrylamides en solution aqueuse." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13020.
Full textPicton, Luc. "Propriétés en solution aqueuse d'éthers cellulosiques associatifs. Influence des cosolutés et de la température : conséquences rhéologiques." Rouen, 1996. http://www.theses.fr/1996ROUES047.
Full textFischer, Arnaud. "Synthèse de nouveaux copolymères amphiphiles cationiques a blocs par voie radicalaire contrôlée et examen de leurs propriétés physico-chimiques en solution aqueuse." Vandoeuvre-les-Nancy, INPL, 2000. http://www.theses.fr/2000INPL069N.
Full textGlinel, Karine. "Polysaccharides perfluorés dérivés de pullulane : synthèse et étude des propriétés en solution." Rouen, 1999. http://www.theses.fr/1999ROUES009.
Full textlin, sung-hwa, and 林松華. "viscosity of organic solvent and its diffusivity in polymer solutions." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/21928905796264315209.
Full text國立臺灣大學
化學工程學研究所
90
Mobility of the organic solvent molecules in the polymer solutions is explored and analyzed by a mathematical molecular model which is in principal based on the Erying's absolute reaction rate theory and the Boltzmann statistical analysis. Through the molecular model , the viscosity’s dependency and the diffusivity in polymer solution on the free volume for the organic solvent have been derived. According to the analyzed results, this work reveals a better performance than the work done by Doolittle (J. Appl. Phys., 22, 1031, 1951) for the viscosity of organic solvent. Besides, Fujita-Doolittle empirical equation (Fujita et al., Trans. Faraday Soc., 56, 424, 1960) for the diffusivity of mobile molecule in polymer solution is also deduced from this molecular model. An application of present model is accomplished for the co-extrusion process in fabricating the gradient index (GRIN) plastic optical fiber (POF). The reproduced refractive index distributions by present model show a good agreement with the measured results. Moreover, an analytical model for the soft baking of photoresist film which could contribute to the investigation of diffusivity and activation energy of mobile particle in polymer solution is also suggested in the latest part of this thesis.
Tsai, Jing-Jer, and 蔡境哲. "Operating windows of low-viscosity newtonian and polymer solutions for premetered coating methods." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/23730225405776734984.
Full textKowsari, Kavin. "The Effects of Dilute Polymer Solutions on the Shape, Size, and Roughness of Abrasive Slurry Jet Micro-machined Channels and Holes in Brittle and Ductile Materials." Thesis, 2013. http://hdl.handle.net/1807/42988.
Full textObeidat, Wasfy Mohammed. "Viscosity of the polymer solution phase and other rational approaches to control matrix microsphere properties." 2002. http://purl.galileo.usg.edu/uga%5Fetd/obeidat%5Fwasfy%5F200205%5Fphd.
Full textDirected by James C. Price. Includes articles submitted to Journal of microencapsulation, Journal of pharmaceutics sciences, and US patent protection. Includes bibliographical references.
Seyfaee, Ahmad. "Experimental and theoretical analysis of polyethyleneimine-silica particle formation." Thesis, 2017. http://hdl.handle.net/1959.13/1337756.
Full textSilica particles are used in many applications from engineering such as catalysis and coatings, to medical sciences such as drug delivery. Although silica sources can be found naturally, they are impure and lack desirable functionalities. To overcome the aforementioned disadvantages, the synthesis of silica particles via liquid phase techniques has become more popular. However, it has been shown that it is more beneficial to use less harsh chemicals such as trimethoxymethylsilane (TMOMS) as the silica precursor and polyethyleneimine (PEI) as the catalyst in a phosphate buffer (PB) solution, to form PEI-silica particles. Compared to the conventional Stöber method, these particles are formed more quickly in a less toxic environment. This method produces hydrophobic particles whose surface charge is positive over a wide range of pH. A positive surface charge and/or hydrophobicity generally enhances the selectivity of the PEI-silica particles, which makes the PEI-silica particles good candidates in targeted separation processes. This thesis focuses on the basics of the formation of PEI-silica particles and their characteristics. Scanning electron microscopy (SEM), dynamic light scattering (DLS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), zeta potential, viscometry and gravimetry measurements, as well as time-lapse photography were used for characterisation. First, a general mechanism for the formation of PEI-silica particles was proposed. Three regions in the formation of silica particles were observed: nucleation, growth and equilibrium. The results showed that when particle synthesis was carried out in phosphate buffer solutions some of the PB molecules were likely to be associated with PEI and formed PEI/PB nuclei. Then, these nuclei grew into small particles called “primary particles”, which then aggregated and formed larger PEI-silica particles. In this work, the extent of each region as well as the final particle size were shown to be a function of TMOMS and PEI concentration. By developing a new semi-empirical equation using mass balance and reaction rate equations, the growth and equilibrium regions of PEI-silica particle formation were successfully modelled. In fact, by assuming the existence of different particle generations the peaks and trough in the DLS data were successfully modelled. Having studied the growth and equilibrium, the nucleation region still needed to be further investigated. In the investigation on the nuclei properties, it was found that when PB was not present, silica gel formed instead of particles at pH 10-11. In addition, when PEI was highly charged (pH below 9) there was no visible reaction suggesting silication did not occur. Finally, the effect of mixing on PEI-silica particles was probed. Three modes of mixing were considered: no mixing, mixing by sonication and mixing by magnetic stirring. The results show that the final particle size and their distribution were affected by the mixing modes and their duration. Furthermore, in general, particles that were made by sonication had the largest size and the particles that were formed in the no mixing mode formed the second largest particles based on the location of silica precursor addition. This thesis is important as it relates the particle characteristics to synthesis conditions, which are especially important when considering silica particle applications that require control of specific interactions, in processes such as separation, catalysis and drug delivery. Overall, the increase in understanding and the determination of the relationship between the particle characteristics and synthesis conditions has opened the possibility of the future optimisation of the particle synthesis process.