摘要
采用高温本体聚合方法,由邻苯二甲酸二烯丙酯（DAP）单体在2,3-二甲基-2,3-二苯基丁烷（DMDPB）引发下直接聚合成DAP预聚体,提高DAP单体转化率达到40%以上。确定了合适的聚合温度范围为190-220℃。测定了不同聚合温度下DAP的凝胶时间,通过测定DAP单体在高温聚合凝胶前转化率的变化,研究DAP单体高温聚合反应动力学。在DMDPB用量为0.5%的条件下,此反应体系的反应活化能为Ea=97.45 kJ/mol,反应级数近似为二级反应。
In this paper,the bulk polymerization is used to polymerize diallyl phthalate to prepolymer directly in the presence of DMDPB at high temperature.As a result,the percent conversion of DAP monomer rises up by 40%.And the temperature range of 190～220 ℃ is confirmed,and DMDPB is used as a free initiator with a concentration of 0.5%,because DMDPB,which is alkyl hydrocarbon kind,is very stable in room temperature while compared to those peroxide or azo compounds.The kinetics research of polymerization of diallyl phthalate before gel point is carried out by measuring tlae value of monomer conversion ratio, when the concentration of free initiator is 0.5 %. The reaction activation energy is 97.45 kJ/mol and the data fit the second-order reaction basically.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第21期17-20,共4页
Journal of Wuhan University of Technology
