求翻译：　反应温度对聚苯胺的电导率影响不大，在低温下(0℃左右)聚合有利于提高聚苯胺的分子量并获得分子量分布较窄的聚合物。在过硫酸铵体系中，在一定温度范围内。随着反应体系温度升高，聚合物的产率增加，当温度为30℃时，产率最大。苯胺聚合是放热反应，且聚合过程有一个自加速过程。如果单体浓度过高会发生暴聚，一般单体浓度取0.25～0.5molL-l为宜。是什么意思？

Reaction temperature has little effect on the conductivity of polyaniline, at low temperature (0 ℃ or so) will help improve the polyaniline polymer molecular weight and narrow molecular weight distribution of the polymer obtained. In the ammonium persulfate system, to a certain temperature range. As

reaction temperature on the electrical conductivity of the polyaniline under low temperature will not affect C ( 0 °) around polymer polyaniline conducive to enhancing the molecular weight and molecular weight distribution of polymer is narrower. In urea 46 system, to a certain temperature range. As

　The reaction temperat

　Reaction temperature on the conductivity of polyaniline has little effect at low temperature (0 ° c or so) aggregate increase of molecular weight of polyaniline and get narrower molecular weight distribution of polymers. In the system of ammonium persulfate, to a certain temperature range. As the r