聚（2，5－二甲氧基对苯乙炔）的可溶性前聚物合成及表征

Preparation and Characterization of Soluble Precursor Polymer of Poly(2,5-Dimethoxy Phenylene Vinylene)

研究了合成聚（２，５－二甲氧圣对苯乙炔）的有机可溶性前聚物的反应条件与单体转化率和前聚物产率的关系。实验结果表明：ＮａＯＨ是聚合反应的有效引发剂。适宜的反应条件为：单体与ＮａＯＨ摩尔比为１：１，单体浓度０．０５～０．２ｍｏｌ／Ｌ聚合时间２ｈ，温度低于５℃。正已烷、石油醚作为有机提取剂可有效提高前聚物产率，用ＩＲ、ＵＶ－Ｖｉｓ、￣１ＨＮＭＲ、ＴＧＡ和ＤＳＣ对前聚物进行了表征。

The reaction conditions for preparing the organic soluble precursor polymer ofpoly(2,5-dimethoxy phenylene vinylene)have been examined.The results indicated thatNaOH was an effective initiator for this polymerization,The optimum reaction conditionswere as follovvs:molar ratio of monomer to NaOH 1:1;concentration of monomer 0.05 to0.2mol/L;polymerization time 2 hours and temperature below 5℃,Hexane and petroleumether can effectively increase the monomp,conversion and precursor polymer yield.Thestructure of the polymer precursor were characterized by IR, UV-Vis,￣1H NMR,TGA andDSC.