烷基取代聚噻吩的非等温结晶动力学

根据ＤＳＣ测得的数值，采用Ｊｅｚｉｏｒｎｙ ，Вороховский和由作者实验室提出的一种新方法研究了十二烷基取代聚噻吩（Ｐ３ＤＤＴ） 和十八烷基取代聚噻吩（Ｐ３ＯＤＴ） 的非等温结晶过程，并应用Ｋｉｓｓｉｎｇｅｒ 法求取其结晶表观活化能ΔＥ，探讨了不同烷基取代基团对结晶过程的影响．Ｐ３ＤＤＴ 应用Ｊｅｚｉｏｒｎｙ 和Вороховский法描述时在结晶后期均发生偏离现象，而作者提出的新方法描述时则得到较好的线性关系．求得Ｐ３ＤＤＴ 的ΔＥ 为１８４－７９ｋＪ／ｍｏｌ，Ｐ３ＯＤＴ 的ΔＥ 为２４６－９３ｋＪ／ｍｏｌ，比较结晶表观活化能数值可知，Ｐ３ＤＤＴ 比Ｐ３ＯＤＴ 更易结晶．

NON|ISOTHERMAL CRYSTALLIZATION KINETICS OF THE POLY(3|ALKYLTHIOPHENES)

According to the data obtained from Differential Scanning Calorimetry (DSC),the method of Jeziorny, Вороховский and a new approach proposed by our laboratry are applied to study the nonisothermal crystallization behavior of poly(3|dodecylthiophene) (P3DDT) and poly(3|octadecylthiophene) (P3ODT),and Kissinger method is used to get the value of the crystallization activation energy. The effect of the different alkyl substitution on crystallization is also investigated. In comparison to the methods of Jeziorny and Вороховский in which it can be found that the deviation from the line occurs in the later stage of crystallization, the new approach appears applicable due to the better linear relation. The values of the crystallization activation energy of P3DDT and P3ODT are estimated as 184^78kJ/mol and 246^93kJ/mol, respectivley, which implies that it is easiser to crystallize P3DDT than P3ODT.