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Rubbers polymer electrolytes

Chin Han Chan, PhD, is an associate professor at the Faculty of Applied Sciences, Universiti Teknologi MARA [MARA University of Technology) in Selangor, Malaysia. She has received many research grants, has published many articles in professional journals, has published chapters in books, and has presented at many professional conferences. Her field of interest includes epoxidized natural rubber-based nanostructured blends, thermoplastic elastomer, biodegradable polyester/polyether blends, and solid polymer electrolytes. [Pg.619]

She has pnbhshed more than 45 papers in intematiorral and national refereed journals, more than 60 publications in conference proceedings, and more than 20 invited lectures for international conferences. She has been one of the editors of Malaysian Journal of Chemistry, Berita IKM- Chemistry in Malaysia, and books pnbhshed by Royal Society of Chemistry entitled Natural Rubber Materials, Volume 1 Blends and IPNs and Volume 2 Composites and Nanocomposites. She peer-reviews a few international journals on polymer science. Her research interest is devoted to modified natural rabber-based thermoplastic elastomers, biodegradable polyester/polyether blends, and solid polymer electrolytes... [Pg.626]

Most elastomers require reinforcing fillers to function effectively, and NMR has been used to characterize the structure of such composites as well. One examples is the adsorption of chains onto filler surfaces, -and the strong absorption of these chains into bound rubber —for example, PDMS immobilized onto high surface area silica. - Another example is the use of NMR to image the filler or polymer itself. ° NMR has also been used to study the phase separation and order of water molecules and silanol groups in polysiloxane networks and the activation of transport and local dynamics in polysiloxane-based salt-in-polymer electrolytes. ... [Pg.70]

Poly(styrene-co-butadiene) rubber and poly(acrylonitrile-co-butadiene) rubber latex mixture films were evaluated as precursors of polymer electrolytes. A 50 50 blend was the optimum for mechanical strength and ionic conductivity. A simple equivalent mechanical model for the relationship between the mechanical strength and the structure was developed, which gave good agreement with experimental results, including materials with co-continuous phase morphologies. 26 refs. [Pg.102]

Suksawad, R, Kosugi, K., Yamamoto, Y, Aka-bori, K., Kuroda, H., and Kawahara, S. (2011). Polymer electrolyte membrane with nanomatrix channel prepared by sulfonation of natural rubber grafted with polystyrene. J. Appl. Polym. Set. 122,2403-2414. [Pg.406]

Goujon LJ et al (2011) Flexible sohd polymer electrolytes based on nitrile butadiene rubber/poly (ethylene oxide) interpenetrating polymer networks containing either LiTFSI or EMITFSI. Macromolecules 44(24) 9683-9691, Available at http //pubs.acs.org/doi/abs/10.1021/ ma201662h. Accessed 22 Feb 2013... [Pg.434]

The PMMA polymer electrolyte can also be grafted. For example, it can be grafted with natural rubber in the presence of 4 wt% Sn02 and lithium salts such as LiBF4 and LiC104. The Sn02 nanoparticles are dispersed well... [Pg.418]

O.2UCIO4 is added with a small amount of polymer such as PPO and lithimn poly(lithium vinyl sulfonate), an ionic rubber that can transfer ions is obtained, with an ionic conductivity of 1(T S/cm at room temperature. However, the electrochemical window of the prepared ionic liquid currently is limited to about 3.5 V. As a result, the applications for the obtained gel polymer electrolyte are also limited and cannot meet the demands of high-voltage Uthiiun-ion batteries. [Pg.440]

Ahmad, A., Rahman, M.Y.A., Harun, H., Suait, M.S., Yarmo, M.A. 2012. Preparation and characterization of 49% polyjmethyl methacrylate) grafted natural rubber (mg49)-stannum (IV) oxide (Sn02)-lithium salt based composite polymer electrolyte. Int.. Electrochem. Sci. 7 8309-8325. [Pg.441]

Among the polymer electrolytes obtained from natural polymers, Klink-lai et reported ionic conductivity and NMR spectroscopy of polymer electrolytes formed by the mixture of liquid epoxidized natural rubber with Uthium salts. The authors discussed the correlation between the spin-lattice relaxation times with the solubility of the different lithium salts in the deprotonized liquid rubber. Based on the NMR chemical shift and the resonance half-width and the spin-lattice relaxation times results they concluded that lithium bis(trifiuoro methane sulfonyl)imide is a suitable salt for forming polymer electrolytes with deprotonized liquid natural rubber. [Pg.114]

Lee et al. reported on a solid-state redox supercapacitor made using acrylonitrile butadiene rubber (NBR)-KCI as the solid polymer electrolyte, and chemically deposited PPY as the conducting polymer electrodes on both surfaces of an NBR film. ° The optimal conditions for the preparation of the PPY/NBR electrode were confirmed to be functions of the uptake of the pyrrole monomer into the NBR matrix and the immersion time in... [Pg.462]

Various workers have studied electrol5des made by blending ionic liquids with solvents [3536,43,51,61-63], polymer electrolytes [26,48303538,64-68], polymers as electrode binders [21,4833,69] and ionomers whereby elements of the ionic liquids are incorporated into the pol)rmer backbone [70-75]. Such work has opened up new fields for these materials and simultaneously blurred the distinctions among ionic liquids, and rubber, glassy, gel, ionomer and polymer electrolytes. This is exemplified by a complex scheme in a review by AngeU [26]. hi this chapter, we have included such materials only when the salt forms the major component of the electrolyte, such as polymer-in-a-salt electrolytes or PISE [76,77]. [Pg.191]

The changes, however, are both numerous and significant. First of all, there is a change in the organization of the subject matter. For example, material formerly contained in the section entitled Analytical Chemistry is now grouped by operational categories spectroscopy electrolytes, electromotive force, and chemical equilibrium and practical laboratory information. Polymers, rubbers, fats, oils, and waxes constitute a large independent section. [Pg.1286]

The solidity of gel electrolytes results from chain entanglements. At high temperatures they flow like liquids, but on cooling they show a small increase in the shear modulus at temperatures well above T. This is the liquid-to-rubber transition. The values of shear modulus and viscosity for rubbery solids are considerably lower than those for glass forming liquids at an equivalent structural relaxation time. The local or microscopic viscosity relaxation time of the rubbery material, which is reflected in the 7], obeys a VTF equation with a pre-exponential factor equivalent to that for small-molecule liquids. Above the liquid-to-rubber transition, the VTF equation is also obeyed but the pre-exponential term for viscosity is much larger than is typical for small-molecule liquids and is dependent on the polymer molecular weight. [Pg.513]

Maron, S. H., Nakajima, N. A theory of the thermodynamic behavior of non electrolyte solutions. II. Application to the system benzene-rubber. J. Polymer Sci. 40, 59-71... [Pg.165]

QDO, PDO, and related compounds are the subject of a great number of invention patents, particularly for its uses in material sciences. For example, QDOs were included in the formulation of modified unsaturated polymers and rubbers [174,175]. Polymers with a QDO substructure as monomeric unit were used to produce fibers, films, electrochromic elements, electrodes, semiconductors, and electrolyte solutions for secondary batteries [176-179]. [Pg.205]


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See also in sourсe #XX -- [ Pg.499 , Pg.515 ]




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