Low temperature synthesis of high molecular weight polyaniline
Low temperature synthesis of high molecular weight polyaniline
复制标题
DOI：
10.1016/0032-3861(96)88489-8
复制
发表时间：
1996-07-01
期刊：
影响因子：
4.6
通讯作者：
Kenwright, AM
中科院分区：
文献类型：
--
作者：
Adams, PN;Laughlin, PJ;Kenwright, AM
苯胺在低于零度的盐酸溶液中进行氧化化学聚合，得到的聚苯胺分子量比室温下制备的聚苯胺分子量高5 ~ 10倍。确定了得到收率和分子量最高的聚苯胺的最佳聚合温度，溶液态C-13核磁共振光谱分析表明，改进后的聚苯胺与标准聚合物相比缺陷位点较少。尽管这些内在的改进，电导率是相同的数量级的标准聚苯胺。聚苯胺樟脑磺酸盐溶剂铸膜的电导率为295 S cm(-1)，但在膜单轴取向后，沿着拉伸方向电导率上升到820 S cm（-1）。由n -甲基-2-吡咯烷酮溶液浇铸并经甲磺酸质子化的取向膜沿拉伸方向的电导率为260 S cm(-1)，垂直方向的电导率为31 S cm（-1）。版权所有爱思唯尔科学有限公司
Oxidative chemical polymerization of aniline in hydrochloric acid solution at sub-zero temperatures leads to polyaniline with a molecular weight five to ten times higher than that prepared at room temperature. The optimum polymerization temperature to give a polymer with the highest yield and molecular weight has been determined, and solution state C-13 n.m.r. spectroscopy shows that the improved polyaniline has fewer defect sites compared to the standard polymer. Despite these intrinsic improvements, the conductivity is of the same order of magnitude as standard polyaniline. A solvent-cast film of polyaniline camphorsulfonate had a conductivity of 295 S cm(-1), although this rose to 820 S cm(-1) along the stretch direction after the film had been uniaxially oriented. An oriented film cast from N-methyl-2-pyrrolidone solution and protonated with methanesulfonic acid showed a conductivity of 260 S cm(-1) along the stretch direction and 31 S cm(-1) perpendicular to this. Copyright (C) 1996 Elsevier Science Ltd.