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对丙酮/水体系中合成聚苯胺(PAn)的反应进行跟踪,通过聚合过程的开路电压、聚合温度、特性粘度和中间体的分子结构对聚合过程进行研究。结果表明,丙酮/水体系对控制产物的粒度和分子量都有利;当丙酮/水的体积比为0.2左右时,所得产物的各项性能较好。与水体系相比,在丙酮/水混合体系中聚合过程维持高电位的时间延长,聚合链增长时间和自加速反应时间也有延长。苯胺聚合是以头-尾连接形式进行,且中间产物由高氧化态逐渐转变成中间氧化态。
The reaction of polyaniline (PAn) in acetone / water system was followed. The polymerization process was studied by the open circuit voltage, polymerization temperature, intrinsic viscosity and the molecular structure of the intermediate. The results showed that the acetone / water system was favorable for the particle size and molecular weight of the control product. When the volume ratio of acetone / water was about 0.2, the properties of the obtained product were better. Compared with the water system, the polymerization process in acetone / water mixture maintained a high potential for a prolonged period of polymerization chain growth and self-accelerating reaction time is also extended. Aniline polymerization is carried out in a head-tail connection, and the intermediate product gradually changes from a high oxidation state to an intermediate oxidation state.