文献类型：期刊文献

中文题名：两步分散聚合法制备高交联PMMA微球

英文题名：Preparation of High Cross-linked PMMA Microspheres by Two-stage Dispersion Polymerization

作者：杨景辉[1];张蔚[1];汪中进[1]

机构：[1]华东理工大学超细粉末国家工程研究中心,上海200237

年份：2014

卷号：42

期号：5

起止页码：21

中文期刊名：塑料工业

外文期刊名：China Plastics Industry

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：聚甲基丙烯酸甲酯微球;高交联;单分散;两步分散聚合

外文关键词：PMMA Microspheres ; Highly Cross-linking; Monodisperse ; Two-stage Dispersion Polymerization

摘要：以聚乙烯吡咯烷酮(PVP)为分散剂,乙醇和水为溶剂,偶氮二异丁腈为引发剂,甲基丙烯酸甲酯(MMA)为单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,采用两步分散聚合法制备了单分散高交联的PMMA微球。研究了滴加开始时间、滴加持续时间、交联剂用量和交联剂种类对交联PMMA微球粒径和粒径分布的影响。结果表明:滴加开始时间在反应90 min之后,才能得到交联PMMA微球,并且滴加开始时间越晚,微球的粒径越大,粒径分布变宽;随着滴加持续时间的延长,微球的粒径增大,粒径分布变窄;随着交联剂用量的增加,微球粒径增大,粒径分布变宽。对交联PMMA微球的性能进行分析测试,发现所制备的微球具有优异的耐溶剂性和热稳定性,不溶物含量最高达到90.43%。
Monodisperse,highly cross-linked PMMA microspheres were prepared by two-stage dispersion polymerization with polyvinylpyrrolidone （PVP） as dispersing agent,ethanol-water as solvent,2,2-azobisizobutyronitrile （AIBN） as initiator,ethylene glycol dimethacrylate （EGDMA） as cross-linker and methyl methacrylate as monmer.The influence of the addition start time,the total addition time,the dosages of the crosslinking agent and the kind of crosslinking agent on the particle diameter and the distribution of the particle diameter of the cross-linked PMMA microspheres were investigated.The results showed that the crosslinked PMMA microspheres can be obtained only after 90 min of the addition,and with the later the addition start time,the particle diameter increased and the distribution of the particle diameter widened ; with the total addition time extended,the particle diameter increased and the distribution of the particle diameter narrowed ;with the increase of the dosages of the crosslinking agent,the particle diameter increased and the distribution of the particle diameter widened.Through the properties characterization,it is found that the microspheres with excellent solvent resistance and thermal stability and the insoluble matter content reached the maximum of 90.43 ％.