Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Quatemized polymers

Fig. 4-7. Relation between the free energy changes of substrate binding and of activation for intracomplex reaction for partly quatemized polymer catalysts. 30 °C, 1.0 M KCl. pH 8. Reproduced by permission from Shinkat. S., and Kunitake, T. Polymer, J. (Trrf yo), 4,253 (1973)... Fig. 4-7. Relation between the free energy changes of substrate binding and of activation for intracomplex reaction for partly quatemized polymer catalysts. 30 °C, 1.0 M KCl. pH 8. Reproduced by permission from Shinkat. S., and Kunitake, T. Polymer, J. (Trrf yo), 4,253 (1973)...
The uptake of unquaternized polymer is insensitive to NaCl concentration and uptake of quatemized polymer is enhanced at high salt concentrations. [Pg.983]

Near resonant z-scan studies provide both nonlinear refractive coefficients, ni, and two photon absorption coefficients, p. Results for a selection of PDAs in solution at 532 nm are given in Table 1. Diethylamino-PDA (lid) and the related quatemized polymer (15a) show comparable magnitudes of nonlinear absorption and refraction to those of poly-4-BCMU, with figures of merit, T, which satisfy the requirement for nonlinear optical switching devices. The metal-containing PDAs... [Pg.328]

Many kinds of AEMs based on quatemized polymers containing a quaternary ammonium group have been developed and tested in ADAFC, such as polyethersulfone cardo (QPES-C) [205], polyetherketone cardo (QPEK-C) [206], poly (phthalazinone ethersulfone ketone) (QPPESK) [207], poly(arylene ethersulfone) (QPAES) [208-210], QPAES cross-linked with tetraphenylolethane glycidyl ether (QPAES/4EP) [210], poly (arylether oxadiazole) (QPAEO) [211], poly styrene-block-poly (e thy lene-ran-butylene)-block-poly styrene (QSEBS) [212], poly(vinyl alcohol) (QPVA) [213], poly(vinyl chloride) (QPVC) [214], and poly (vinylbenzyl chloride) (QPVBC) [215]. The chemical structures of some of these polymers are shown in Fig. 6.13. [Pg.136]

Kabanov etal.123 hydrolyzed 44 (PNPA) and 56 (NABA) in the presence of QPVP. They found that the hydrolysis rate decreased with increasing degree of quatemization in water. A bell-shaped dependence was observed for 56 (NABA) in alcohol-aqueous media (see Fig. 13). Recently, Cho and Morawetz discussed the hydrolyses of a polymer substrate by a pyridine-containing polymer124. ... [Pg.165]

Glycidyl ether additives are obtained by esterification of alkoxylated primary fatty amines and additives of polyether-block polymers and glycidyl ethers with dicarboxylic acids [1025], They are used as demulsifiers to break up oil emulsions and, as quatemized products, they are suitable as corrosion inhibitors. [Pg.341]

Fig. 30. Effect of quatemization of poly-(4-vinylpyridine) ligand on rate constant of electron-transfer step (fce), rate constant of reoxidation step of catalyst ( 0), and viscosity of polymer-Cu-catalyst solution159)... Fig. 30. Effect of quatemization of poly-(4-vinylpyridine) ligand on rate constant of electron-transfer step (fce), rate constant of reoxidation step of catalyst ( 0), and viscosity of polymer-Cu-catalyst solution159)...
See other pages where Quatemized polymers is mentioned: [Pg.342]    [Pg.25]    [Pg.121]    [Pg.25]    [Pg.6170]    [Pg.304]    [Pg.279]    [Pg.305]    [Pg.322]    [Pg.484]    [Pg.342]    [Pg.25]    [Pg.121]    [Pg.25]    [Pg.6170]    [Pg.304]    [Pg.279]    [Pg.305]    [Pg.322]    [Pg.484]    [Pg.45]    [Pg.567]    [Pg.680]    [Pg.689]    [Pg.728]    [Pg.746]    [Pg.831]    [Pg.909]    [Pg.910]    [Pg.54]    [Pg.80]    [Pg.608]    [Pg.427]    [Pg.429]    [Pg.429]    [Pg.264]    [Pg.97]    [Pg.185]    [Pg.736]    [Pg.42]    [Pg.52]    [Pg.79]    [Pg.530]    [Pg.567]    [Pg.680]    [Pg.689]    [Pg.728]    [Pg.746]    [Pg.826]    [Pg.831]    [Pg.909]    [Pg.910]   
See also in sourсe #XX -- [ Pg.136 ]



SEARCH



© 2024 chempedia.info