Дисертації з теми "Polyelectrolytes Conductivity"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-15 дисертацій для дослідження на тему "Polyelectrolytes Conductivity".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Lilley, Scott J. "Enhancing the conductivity of crystalline polymer electrolytes." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/481.
Повний текст джерелаWang, Shanshan. "Development of solid polymer electrolytes of polyurethane and polyether-modified polysiloxane blends with lithium salts." Akron, OH : University of Akron, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1196139638.
Повний текст джерела"December, 2007." Title from electronic dissertation title page (viewed 01/30/2008) Advisor, Kyonsuku Min; Committee members, Mark Soucek, Kevin A. Cavicchi, Gary R. Hamed, Michael H. Cheung; Department Chair, Sadhan C. Jana; Dean of the College, Stephen Z. D. Cheng; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
Zapata, Pedro José. "High throughput study of fuel cell proton exchange membranes: poly(vinylidene fluoride)/acrylic polyelectrolyte blends and nanocomposites with zirconium." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33991.
Повний текст джерелаBocharova, Vera. "Electrically Conductive Low Dimensional Nanostructures: Synthesis, Characterisation and Application." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1231161926227-23379.
Повний текст джерелаBocharova, Vera. "Electrically Conductive Low Dimensional Nanostructures: Synthesis, Characterisation and Application." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23607.
Повний текст джерелаLin, Chia-Hung, and 林家宏. "Ionic Conductivity and Electrochemical s Reactions of Rigid-Rod Solid Polyelectrolytes." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/38022107140773093720.
Повний текст джерела國立中山大學
材料科學研究所
91
ABSTRACT sPBI is a heterocyclic aromatic polymer assuming a para- catenated backbone yielding a rod-like configuration. Because of its rigidity, this rod-like molecule displays superior mechanical tenacity, thermo-oxidative stability, and solvent resistance. It is also the precursor of rigid-rod solid polyelectrolyte exhibiting high solubility and superior ionic conductivity. Isotropic solution were prepared by dissolving sPBI in distilled methanesulfonic acid containing 0.0, 0.989, 4.76, 9.09, 15.0, 20.0, 23.1 wt. % lithium ion of dopants of LiCF3SO3 or LiN(CF3SO2)2. The room-temperature DC conductivity of sPBI cast film doped with 15.0 wt. % LiN(CF3SO2)2 parallel (�翣|) and transverse (�粻) to the film surface was as large as 8.26×10-6 and 1.84×10-7 S/cm, respectively. The concentration of 15.0 wt. % lithium ion was considered to be the critical concentration; and LiN(CF3SO2)2 was the more effective dopant. Scanning electron microscopy micrograph of a cut edge of the film displayed a layered structure parallel to the film surfaces, thus the parallel DC conductivity (�翣|) was batter than the transverse DC conductivity (�粻) of the same film. Because the dissociation energy of lithium salt and the relation of temperature and conductivity, we proved that sPBI film had ionic conduction. We used cyclic voltammetry with non-blocking electrode and without auxiliary electrolyte to study the electrochemical reactions of the sPBI rigid-rod solid polyelectrolyte.
Chen, Chien-Chang, and 陳建彰. "Chemical Synthesis and Ionic Conductivity of Water-Soluble Articulated Rigid-Rod Solid Polyelectrolytes." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/73559897782059643859.
Повний текст джерела國立中山大學
材料科學研究所
91
A water-soluble rigid-rod polyelectrolyte sPBI-PS(Li+) could be doped with LiI and cast as a freestanding film from aqueous solution showing a room-temperature in-plane DC conductivity (�������n) of 8.3╳10-3 S/cm. However, the cast film assumed an anisotropic microstructure due to nematic liquid-crystalline rigid-rod backbone leading to an out-of-the plane DC conductivity (����) which was three orders smaller than those of the ������, and severely limited its applications as a solid polyelectrolyte for thin-film battery. 2-Sulfo-terephthalic acid and 5-sulfo-isophthalic acid in ratios of 5:1, 15:1, 25:1, or 50:1 were synthesized via copolycondensation reaction making the rigid-rod backbone of sPBI-PS(Li+) become articulated. Further reaction with 1,3-propanesultone pendants, the rigid-rod polyelectrolyte was changed into a new water-soluble articulated rigid-rod polyelectrolyte a-sPBI-PS(Li+). Various analyses were applied to ascertain chemical structure and purities of synthesized monomers and polymers. The copolymer conductivity and intrinsic viscosity would decrease with increasing the articulation ratio. For a-sPBI-PS(Li+), LiClO4 was a better dopant, compared to LiI, to enhance conductivity. a-sPBI-PS(Li+) (25:1) doped LiI had a room-temperature conductivity as high as 4.7´10-3 S/cm. No layered structure was revealed by wide-angle X-ray scattering and scanning electron microscope. The cast thin-film thus had 3-dimensionally isotropic structure and electrical conductivity.
Sun, Ju-Pin, and 孫如彬. "Chemical Synthesis and Ionic Conductivity of Water-SolubleRigid-Rod and Articulated Rigid-Rod Solid Polyelectrolytes." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/24000426847352258497.
Повний текст джерела國立中山大學
材料科學研究所
89
ABSTRACT A water-soluble rigid-rod polyelectrolyte sPBI-PS(Li+) could be doped with LiI and cast as a freestanding film from aqueous solution showing a room-temperature in-plane DC conductivity (s|| ) of 8.3╳10-3 S/cm. However, the cast film assumed an anisotropic microstructure due to preferential orientation of the rigid-rod backbone leading to an out-of-the plane DC conductivity (s^) which was three orders smaller than those of the s||, and severely limited its applications as a solid polyelectrolyte for thin-film battery. In addition to synthesizing rigid-rod polyelectrolyte sPBI-PS(Li+) for comparison, this study used 2-sulfo-terephthalic acid and isophthalic acid in ratios of 15:1, 25:1, or 50:1 for copolycondensation reaction making the rigid-rod backbone of sPBI-PS(Li+) become articulated. Further reaction with 1,3-propanesultone pendants, the rigid-rod polyelectrolyte was changed into a new water-soluble articulated rigid-rod polyelectrolyte A-sPBI-PS(Li+). Various analyses were applied to ascertain chemical structure, purities, thermal properties and molecular weight of synthesized monomers and polymers. Freestanding films of sPBI-PS(Li+) and A-sPBI-PS(Li+) were cast from aqueous solutions doped with LiI, LiBF4, or LiCF3SO3 for various concentrations up to 5 wt.%. Thin-film room-temperature s|| of sPBI-PS(Li+) could be 3.15´10-3 S/cm, and of A-sPBI-PS(Li+) could be 2.76´10-3 S/cm. X-ray scattering and electron microscopic results suggested that the sPBI-PS(Li+) cast film was in-plane isotropic but out-of-the plane anisotropic, and the A-sPBI-PS(Li+) cast film was three-dimensionally isotropic.
Du, Yue-Lin, and 杜岳霖. "Chemical Synthesis and Ionic Conductivity of Water-Soluble Articulated Rigid-Rod Polyelectrolytes Derivatized with Sulfonated Ionomer Pendants." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/50733740246668114282.
Повний текст джерела國立中山大學
材料科學研究所
93
Articulated rigid-rod polymers asPBI were synthesized via polycondensation reaction. Using 2-sulfoterephthalic acid and 5-sulfoisophthalic acid in different ratios for copolycondensation reaction making the fully conjugated rigid-rod backbone became articulated. Both rigid-rod and articulated rigid-rod were further derivatized using alkane sulfonated pendants and became water-soluble rigid-rod and articulated rigid-rod polyelectrolytes. Lithium salt doped cast films of the polyelectrolytes showed a root-temperature DC conductivity parallel to film surface (
Tsay, Pei-yun, and 蔡珮芸. "Chemical Synthesis and Ionic Conductivity of Water-Soluble Rigid-Rod Solid Polyelectrolytes with Aspect Ratio and Pendant Modifications." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/04523684329511900792.
Повний текст джерела國立中山大學
材料科學研究所
93
Polycondensation reaction was carried out for synthesizing rigid-rod polymer hPBI. Various molar ratios (50:1, 25:1, and 15:1) of 2-hydroterephthalic acid and 5-hydroisophthalic acid were also introduced in the synthesis for articulated rigid-rod polymer a-hPBI. The polymers were further derivatized with 1,3-propanesulton for pendants of lithium ionomer to become water soluble polyelectrolytes hPBI-PS(Li+) and a-hPBI-PS(Li+), respectively. Lithium salt doped cast film of the rigid-rod polyelectrolyte hPBI-PS(Li+) showed a room-temperature DC conductivity parallel to film surface as high as 4.02×10-3 S/cm. Molecular weight of the rigid-rod polyelectrolyte was low indicating a small molecular aspect ratio. In cast film, the molecules were randomly distributed and highly isotropic facilitated Li cations mobility for a high film conductivity. The conductivity was also insensitive to the anion of lithium salt. No apparent layered structure was revealed by scanning electron microscope suggesting that the cast films had near three-dimensionally isotropic structure and conductivity.
Binesh, Nader. "NMR And Conductivity Investigations Of Certain Polymeric And Inorganic Fast Protonic Conductors." Thesis, 1997. http://etd.iisc.ernet.in/handle/2005/1828.
Повний текст джерелаEzzeddine, Alaa. "Surface Modification of Carbon Nanotubes with Conjugated Polyelectrolytes: Fundamental Interactions and Applications in Composite Materials, Nanofibers, Electronics, and Photovoltaics." Diss., 2015. http://hdl.handle.net/10754/582475.
Повний текст джерелаChen, Yun-Sheng, and 陳昀聖. "Chemical Synthesis and Ionic Conductivity of Water-Soluble Rigid-Rod Polyelectrolyte." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/87571283566328804510.
Повний текст джерела國立中山大學
材料科學研究所
89
Poly(p-phenylenebenzobisimidazole), PBI, is a rigid-rod polymer with a fully conjugated backbone having superior mechanical properties, thermo-oxi- dative and solvent stabilities. The stabilities cause processing difficulties and in terms limit its applications in critical technologies, such as conducting polymers, nonlinear optics, and solid polyelectrolytes. In this study, a chemical derivative of PBI, poly[1,7-dihydrobenzo[1,2- d:4,5-d’]diimidazo-2,6-diyl[2-(2-sulfo)-p-phenylene]], sPBI, was synthesized by polycondensation reaction of 1,2,4,5-tetraaminobenzene tetrahydrochloride with 2-sulfoterephthalic acid in poly(phosphoric acid). Isolated sPBI was measured in 30oC methanesulfonic acid for an intrinsic viscosity as high as 10.5 dL/g. sPBI polymer was then reacted with 1,3-propanesultone in dimethylsulfoxide containing sodium hydride for water-soluble rigid-rod polyelectrolyte, poly[1,7- dipropylsulfobenzo-[1,2-d:4,5-d’]diimidazo-2,6-diyl-[2,(2-sulfo)-p-phenylene]], sPBI-PS(Na+). sPBI-PS(Na+) was further converted to sPBI-PS(Li+) with hydrochloride and followed with lithium hydroxide. Various analyses were applied to ascertain chemical structure, purities and thermal properties of synthesized monomers and polymers. sPBI-PS(Li+) aqueous solutions were doped individually with lithium salts of LiI, LiBF4, and LiCF3SO3 at concentrations up to 1.7×10-5 wt./wt., which were cast into freestanding films of 10-25 μm in thickness. Direct-current conductivity measured at room- temperature parallel to the film surface was as large as 9.74×10-5 S/cm. The ionic nature of the conductivity was revealed by constant-voltage depletion measurements. X-ray scattering results suggested that the cast film was in-plane isotropic but out-of-the plane anisotropic with the rigid-rod backbone lying in the plane of the film.
Yang, Szu-nang, and 楊思楠. "Studies on Molecular Configuration and Thermodynamic Behavior of Polyelectrolyte Solutions Based on their Conductivity Characterasitic." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/55918442071706617974.
Повний текст джерела國立臺灣大學
材料科學與工程學研究所
86
The main purpose of this research thesis is to explore the of the thermodynamics and transport characteristics of polyelectrolyte solutions. Generally, the behavior of polyelectrolyte solutions is affected by three main factors: 1. Viscosity effect (which includes the viscosity of the polyelectrolyte and the viscosity after salt is added). 2. Shape effects (the degree of difficulty of dispersion and migration). 3.The inter chain's and intra chain's electrostatic force. These three factors are not completely independent and then intricate interaction renders the thermodynamics of polyelectrolyte solutions different from other polymer solutions. A novel theories, based on the "Core shell Model" and "Coagulation Phenomena", was proposed to give an accurate perdiction on the scaling relationship of equivalent conductivity vs. concentration and molecular weight of polyelectrolytes. Description of the conformations of polyelectrolyte under different concentration was also provided. A reported conductivity data of Poly( sodium styrene sulfonate) [NaPSS] solutions with monodispersed molecular weight was choose to check the application of the theory. The conductivity and viscosity of Poly( sodium styrene sulfonate) [NaPSS] solution with multidispersed molecular weight were also measured and the results were employed to investigat the effect of multidispersity of molecular weight on the theoretical prediction.
Yang, Si-Nan, and 楊思楠. "Studies on Molecular Configuration and Thermodynamic Behavior of Polyelectrolyte Solutions Based on their Conductivity Characterasitic." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/87135636568262959542.
Повний текст джерела