苯乙烯/二乙烯基苯在乙醇/乙二醇单甲醚中分散共聚合速率及粒子大小的研究  

DISPERSION COPOLYMERIZATION OF STYRENE/DIVINYLBENZENE IN THE MIXTURE OF ETHANOLAND ETHLENE GLYCOL MONOMETHYL ETHER

作　　者：黄锦霞[1] 许俊鸿[1] 孙蓉[1] 张洪涛[1] 

机构地区：[1]高分子材料湖北省重点实验室湖北大学化学与材料学院,武汉430062

出　　处：《高分子学报》2003年第4期535-539,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目 (基金号 2 99740 0 7)

摘　　要：以乙醇 乙二醇单甲醚 (EOH EGME)为介质 ,羟丙基纤维素 (HPC)为稳定剂 ,偶氮二异丁腈 (AIBN)为引发剂进行了苯乙烯和二乙烯基苯的分散共聚合研究 .制得粒径在 6～ 10 μm范围内的单分散交联聚苯乙烯微球 (CPS) .探讨了不同介质配比 ,以及苯乙烯、二乙烯基苯、引发剂的浓度对微球大小、粒径分布、聚合速率及稳定性的影响 .当苯乙烯和AIBN浓度增加时 ,聚合速率和平均粒子尺寸增加 ,而粒子分布变宽 ,粒子数先增加 ,而后降低 .随着EOH EGME比例的增加 ,平均粒子尺寸增加 ,而分布指数降低 ,稳定剂增加 ,粒子尺寸降低和粒子数增加 ,但对聚合速率及粒子分布影响不太明显 .另外还探讨了单体和交联剂的后滴加法对微球大小。Dispersion copolymerization of styrene (St) and divinylbenzene (DVB) was carried out in mixture solvents composed of ethanol (EOH) and ethylene glycol monomethyl ether (EGME) using hydroxypropylcellulose (HPC) as a steric stabilizer. Monodispersed crosslinked polystyrene microspheres were prepared in an average diameter range of 6 similar to 10 mum. The effects of the amount of styrene, divinylbenzene, initiator AIBN and ratio of EOH/ EGME on the average size and size distribution of microspheres, and on the variation of particle number and polymerization rate were studied. With increasing styrene and initiator AlBN, the polymerization rate and the particle size increase, but the size distribution broadens, at the same time the particle number first increases, and then decreases. The particle size increases, and the size distribution becomes narrow with increasing the ratio of EOH/ EGME. The concentration of stabilizer has no obvious effect on the polymerization rate and size distribution of particles,but the average size of particles decreases and the particle number increases with increasing the stabilizer concentration. The effects of the post-addition method on the average size of particles and size distribution were also discussed.

关 键 词：苯乙烯 二乙烯基苯 乙醇 乙二醇单甲醚 分散共聚合 聚合速率 粒径分布 聚合稳定性 后滴加法 微球粒径 

分 类 号：TQ316.3[化学工程—高聚物工业]