文献类型：期刊文献

英文题名：Effect of ultrasonic separation on the structure and properties of diallyl phthalate prepolymer

作者：Xu, Shi-Ai[1,2];He, Ming[2];Shi, Qing-Feng[2];Jin, Guo-Cheng[1];Yao, Jun-Qi[1];Yu, Ruo-Bing[1];Wu, Chi-Fei[1]

机构：[1]E China Univ Sci & Technol, Key Lab Preparat & Applicat Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Excellent Students Sci & Technol, Shanghai 200237, Peoples R China

年份：2008

卷号：15

期号：4

起止页码：364

外文期刊名：ULTRASONICS SONOCHEMISTRY

收录：;EI(收录号：20082211288344);WOS:【SCI-EXPANDED(收录号:WOS:000254443900019)】；

语种：英文

外文关键词：ultrasonic separation; diallyl phthalate; prepolymer; unsaturated polyester; thermosetting resin

摘要：The bulk polymerization of diallyl phthalate (DAP) was carried out at high temperature (190 degrees C) without using any initiator, and the reaction was stopped before the gelation point in order to get the prepolymer of DAP. The mixture for the prepolymer and the monomer was successfully separated by a novel ultrasonic method for the first time, and the separation efficiency for the new method was obviously higher than that for the traditional reprecipitation. The product obtained by ultrasonic separation was characterized by infrared spectroscopy (IR), gel permeation chromatography (GPC) and iodine number measurement. It was shown that the average molecular weight of the prepolymer got by the ultrasonic method was lower than that of the prepolymer got by the multi-precipitation, moreover, the molecular weight distribution of the prepolymer got by the ultrasonic separation was broader. Besides, the residual unsaturation degree of the prepolymer separated by ultrasonic was slightly higher than that of prepolymer separated by reprecipitation. (C) 2007 Published by Elsevier B.V.