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• W1979080375 abstract "The copolymerization of aniline (An) with o-alkoxysulfonated anilines, i.e. 1-(o-amino)-propane-3-sulfonic acid (APPrS) and 1-(o-amino)-butane-4-sulfonic acid (APBuS), was a new way to produce water-soluble and self-doped polyaniline derivatives. Poly(An-co-APPrS) and poly(An-co-APBuS) were synthesized, in H2SO4 acidic medium, by chemical oxidation using ammonium persulfate. The mechanistic study showed that, during their copolymerization, aniline and alkoxysulfonated-derivatives exhibit two opposite behaviors towards the initial mechanism of dimerization and the following growing process. Because of the steric hindrance of the bulky alkoxysulfonated groups, the dimerization process involved at least one molecule of aniline. On the contrary, in the course of the propagation step, due to the electron-donating effect of the substituent, both alkoxysulfonated anilines exhibited much greater reactivity than aniline and hence were easily incorporated into the growing polymer chains. The comonomer reactivity ratios, computed by using the extended Kelen–Tüdös method, were as follows: rAn=0.04±0.01, rAPPrS=27±9 and rAn=0.04±0.01, rAPBuS=12±6. These findings strongly suggest the formation of block copolymers." @default.
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• W1979080375 date "1999-07-01" @default.
• W1979080375 modified "2023-10-09" @default.
• W1979080375 title "Studies on chemical oxidative copolymerization of aniline and o-alkoxysulfonated anilines II. Mechanistic approach and monomer reactivity ratios" @default.
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• W1979080375 doi "https://doi.org/10.1016/s0014-3057(98)00211-0" @default.
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