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VINYLPYRIDINE COPOLYMER

Zhou L.L. and Eisenberg A., lonomeric blends. II. Compatibility and dynamic mechanical properties of sulfonated cis-l,4-polyisoprenes and styrene/4-vinylpyridine copolymer blends, J. Polym. Sci., Polym. Phy., 21, 595, 1983. [Pg.163]

The initiation and propagation rate constants for the degradation of the 4-vinylpyridine copolymers obtained at several temperatures may be used to determine both the activation... [Pg.279]

Table 9.6 Characterization data for arborescent polystyrene-grra/t-poly(2-vinylpyridine) copolymers (adapted from ref. 17)... [Pg.225]

TABLE 1 Emission lifetimes (in aerobic aqueous solution), Stem Volmer constants and rate constants for quenching by MV2+ of the excited [Ru(bpy3]2+—like centre of the N-ethylated vinylpyridine copolymer at various salt concentrations. [Pg.67]

Control over the side-chain molecular weight was achieved through the amount of monomer added to the activated substrates. The B values obtained ranged from 1.1 to 1.3 for molecular weights (M ) reaching 7 X 10 g/mol. The same technique was also used to synthesize arborescent copolymers, by adding other monomers in the last side-chain growth cycle, namely, arborescent polystyrene- -poly(fert-butyl methacrylate) and polystyrene- -[polystyrene-fe-poly(2-vinylpyridine)] copolymers [115]. [Pg.578]

Entrapment in polyacrylamide gel over a platinum grid matrix Glutaraldehyde-mediated reaction with a nylon-polyethyleneimine copolymer Reaction with macroporous aminated silo chrome coated with an acrolein-vinylpyridine copolymer Adsorption onto tannin coupled to amino hex y 1-cellulo se Entrapment in cellulose fibres Carbodi-imide-mediated reaction with chitosan... [Pg.689]

The PMEs were investigated for their ability to mediate oxidation of such biologically important analytes as ascorbic acid (AA) and dihydronicotinamide adenine dinucleotide (NADH). Van Koppenhagen and Majda incorporated ferricyanide ions into a film of polyacrylamide and acrylamide/vinylpyridine copolymers on electrode surfaces by ion exchange, and they examined the kinetics of the mediated oxidation of AA by ferricyanide. The mediated reaction occurred at lower anodic potentials (200 mV versus Ag/AgCl) than the corresponding... [Pg.277]

The apparatus is described and details given of its use with PETP homopolymer, PS/poly(vinyl methyl ether) miscible blend and styrene-styrenesulphonic acid copolymer/ethyl acrylate-4-vinylpyridine copolymer ionomer blend with ionic interactions. Orientation and relaxation curves were obtained for all three samples. It is concluded that the technique is very efficient for obtaining curves with high precision. For these three systems, the relaxation rate increases with temperature. [Pg.65]

Pliocord VP Latex Vinylpyridine copolymer Goodyear Chemicals... [Pg.2327]

An investigation (113) of the Tg of the poly(styrene-co-vinylpyridine) copolymers quatemized with iodoalkane found that the Tg increased with increasing ion content, but that the increasing rate of the Tg with ion contents (dTg/dc) depended on the length of an alkyl chain. For example, dTg/dc for the ionomer quatemized with iodomethane was ca 3.2°C/mol%, while for the ionomer quatemized with iododecane it was only ca l.l°C/mol%. [Pg.4125]

Chen and co-workers (53) describe the S5mthesis of iron nanoparticles dispersed in poly(4-vinylpyridine) homopolymer and vinylstyrene-4-vinylpyridine copolymers by chemical reduction of thin films of iron chloride/polsmer... [Pg.4988]

Orion model 95-10 ammonia-gas sensing electrode 2.4.1.19 Adsorption onto a vinylpyridine copolymer... [Pg.499]

RgureSI Supramolecular polymeric complex 42 prepared from a polystyrene-/7/ocfc-poly(4-vinylpyridine) copolymer, pentadecylphenol, and toluenesulfonic acid. [Pg.154]

Vinylpyridines can be copolymerized radically with numerous common monomers. In many copolymerizations vinylpyridines are used in small quantities only. The most important technical product is a terpolymer from 1,3-butadiene (70 to 80% by weight), styrene (10 to 15%, and 10 to 15% of 2-vinylpyridine) [606]. Copolymers of methacrylic esters of long-chain alcohols and vinylpyridine have been applied as an oil additive. This and other applications for vinylpyridine copolymers are reviewed in detail in Ref. [607]. Copolymerization parameters are listed in Refs. [543,545,608,609] some of the newer results are given in Tables 5 and 6. [Pg.141]

Chen et al. [37] studied a series of complexes of styrene-4-vinylpyridine copolymers or poly(4-vinylpyridine) and transition metal chlorides. The transition metal-polymer complexes were used to prepare ultra-fine metallic particles dispersed in a polymer matrix by chemical reduction. Upon reduction, the metal ions were transformed into the corresponding nanometer scale metal particles with the protective polymers preventing the metal particles from oxidation and excessive aggregation. Ohtaki et al. reported the effects of polymer support on the substrate selectivity of covalently immobilized ultra-fine rhodium particles as a catalyst for olefin hydrogenation [38]. [Pg.6]

Gauthier M, Li J, Dockendoiff J (2003) Arborescent polystyrene-graft-poly(2-vinylpyridine) copolymers as unimolecular micelles. Synthesis from acetylated substrates. Macromolecules... [Pg.384]

VED Vedikhina, L.I., Kurmaeva, A.I., and Barabanov, V.P., Phase separation in solutions of polyampholytes of acryhc acid-2-methyl-5-vinylpyridine copolymers (Russ ), Vysokomol. Soedin., Ser. A, 27,2131,1985. [Pg.712]

The same strategy has been used very recently to prepare BCs containing a low percentage of azobenzene moieties, from commercial poly(styrene)-h/oc/c-poly(4-vinylpyridine) copolymers. A chromophore with a carboxylic group has been used in the preparation of hquid crystalline BCs. It should be noted that these systems are only homogeneous when the percentage of... [Pg.538]


See other pages where VINYLPYRIDINE COPOLYMER is mentioned: [Pg.63]    [Pg.283]    [Pg.224]    [Pg.304]    [Pg.63]    [Pg.1931]    [Pg.1931]    [Pg.133]    [Pg.9]    [Pg.324]    [Pg.68]    [Pg.1931]    [Pg.1931]    [Pg.132]    [Pg.63]    [Pg.267]    [Pg.209]    [Pg.1931]    [Pg.1931]    [Pg.2290]    [Pg.257]    [Pg.257]    [Pg.97]    [Pg.134]    [Pg.112]    [Pg.6]    [Pg.536]    [Pg.179]   
See also in sourсe #XX -- [ Pg.92 ]




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