【摘要】 通过流变学手段对聚苯胺溶液的凝胶化行为研究表明，在室温下，聚苯胺（ＰＡｎ）／Ｎ－甲基－２－吡咯烷酮（ＮＭＰ）溶液有一转折浓度Ｃｇ（０．０５ｇ／ｍＬ），浓度高于此值时，浴液凝胶化速度急剧增大，凝胶速度还与溶剂，ＰＡｎ分子量及溶液的温度有很大关系。溶液中不溶的ＰＡｎ的存在会加速凝胶化过程。ＰＡｎ／ＮＭＰ凝胶的假塑性和触变性明显地反映出ＰＡＶＮＭＰ溶液的凝胶化是溶剂参与的ＰＡｎ分子链间的物理交联过程。更多还原

【Abstract】 The gelation behaviour of the polyaniline(PAn)/N-methyl-2-pyrrolidone(NMP)solution was studied by rheological method.A critical concentration near 0. 05g/mL for theP An/NMP solution at room temperature was observed.The gelation rate was found to bedependent on the solvent,molecular weight of PAn,and the temperature of the solution. The insoluble fraction in the PAn solution could accelerate the gelation. The pseudo-plasticand thixotropic behavior of the PAn/NMP gel obveously revealed the existence of physicalcross-linking in the PAnlNMP solution under participation of the solvent.更多还原