论文部分内容阅读
Conventional chloromethylation,paraformaldehyde/hydrogen chloride in acetic acid medium,was applied to 1,2- dimethoxybenzene.Chloroform-soluble poly(3,4-dimethoxy-o-tolylene)was obtained with an intrinsic viscosity of 0.034 dL g~(-1).The polymer was evaluated as a condensation redox polymer precursor formed by a Friedel-Crafts reaction. Cleavage of the methoxy groups present in this polymer resulted in poly(3,4-dihydroxy-o-tolylene)which manifested a great air-oxidation resistance.The redox property of the latter polymer was found to be 1017 mV by potentiometric titration with 0.05 N ceric ammonium nitrate at 25℃.This midpotential was compared to that of catechol,a monomeric analogue,under the same titration conditions.
Conventional chloromethylation, paraformaldehyde / hydrogen chloride in acetic acid medium, was applied to 1,2- dimethoxybenzene.Chloroform-soluble poly (3,4-dimethoxy-o-tolylene) was obtained with an intrinsic viscosity of 0.034 dL g ~ The polymer was evaluated as a condensation redox polymer precursor formed by a Friedel-Crafts reaction. Cleavage of the methoxy groups present in this polymer resulted in poly (3,4-dihydroxy-o-tolylene) which manifested a great air-oxidation resistance. The redox property of the latter polymer was found to be 1017 mV by potentiometric titration with 0.05 N ceric ammonium nitrate at 25 ° C. This midpotential was compared to that of catechol, a monomeric analogue, under the same titration conditions.