摘要
本文主要研究聚对氯甲基苯乙烯同第三胺进行季铵化反应的动力学。结果表明:三乙胺、三丁胺以及吡啶等与聚对氯甲基苯乙烯的反应符合二级反应动力学方程式: f(x)=1/a-b ln[b(a-x)/a(b-x)]=Kt 第三胺在这个反应中的活性有这样的次序:三乙胺>三丁胺>吡啶》N,N-二甲苯胺、对-溴-N,N-二甲苯胺。其中,前三者的反庠活化能分别为12.92kcal/mol、14.57kcal/mol及19.13kcal/mol,而后二者与聚对氯甲基苯乙烯在80℃下几乎不发生反应。
In this paper the kinetic characteristics of the quaternization of poly-p-chloromethyl sty-rene (P-pCMS) are explored. It has shown that the quaternization'of P-pCMS with triethyla-mine (TEA), tributylamine (TBA), and pyridine all conform with the kinetic equation for second order reactions, i.e., they are second order reaction. The activity sequence of the ter-tiaryamines examined is as follows: triethylamine>tributylamine> pyridine >>3N N-dimethyl-aniline, p-bromo-N, N-dimethyl-aniline, ia which the activation energy of the former three is 12.92, 14.57, and 19.13 Kcal/mol respectively and the latter two only show negligible activity even at 80℃. This sequence of activity is consistant with the pKb values of these tertiary amine.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1990年第4期459-462,共4页
Acta Polymerica Sinica
