高分子量PPV的合成、掺杂及导电性

Synthesis, Doping and Electrical Conductivity ofHigh Molecular Weight Poly(p-pheylene vinylene)

高分子量的聚对苯乙炔（ＰＰＶ）是从单体１．４一二氯甲基苯合成，后者聚合产生水溶性铳盐，此时，对于ＰＰＶ的转换可用二甲硫醚和盐酸的热消除反应，从水溶液中成膜。用ＩＲ、ＵＶ－Ｖｉｓ、ＴＧＡ分析研究了消除反应。ＰＰＶ膜具有良好的机械性能，而且可能是由于ｎ－和ｐ－型杂质得到的材料具有的导电性近似于这些高掺杂聚乙炔。中间聚电解质的转换率对于ＰＰＶ可能是一种调整，并且这些掺杂膜的导电性。

High molecular weight poly(p-phenylene vinylene) (PPV) has been synthesized starting from the monomer p-xylylene-bis (dimethylsulphonium chloride). The latter was polymerized to yield a water-soluble sulphonium salt polyeletrolyte, which was converted to PPV by the thermal elimination of (CH3)2S and HCl from films cast from its aqueous solution. The elimination reaction was studied by IR,UV-Vis,TGA. The PPV films has good mechanical properties and could be n-and p-doped to yield material with electrical conductivities approaching those of highly doped polyacetylene. The degree of conversion of the intermediate polyelectrolyte to PPV could be controlled and the conductivities of these doped films could be related to the average conjugation length.