种子溶胀法制备单分散高交联聚苯乙烯微球  

Mono-dispersed Cross-linked Polystyrene Micro-spheres Prepared by Seed Swelling Polymerization Method

作　　者：王东莎[1] 刘彦军[1] 

机构地区：[1]大连轻工业学院化工系,大连116034

出　　处：《应用化学》2007年第11期1289-1294,共6页Chinese Journal of Applied Chemistry

基　　金：辽宁省自然科学基金资助项目(20022116)

摘　　要：以分散聚合法制得平均粒径为1.80μm的聚苯乙烯微球为种子,与溶胀剂和单体、交联剂的混合物经二步溶胀聚合法,制备了单分散高交联聚苯乙烯微球。讨论了单体浓度和醇水比对种球的影响,以及溶胀剂的种类、溶胀剂浓度、交联剂浓度、溶胀温度和搅拌速度等因素对交联聚苯乙烯微球粒径及分散系数的影响。用扫描电子显微镜、离心式粒度分析仪及DSC分析测试技术对微球的外观形貌、粒径大小及分布和玻璃化转变温度分别进行了表征。结果表明,当溶胀剂质量分数为25%、交联剂质量分数为23%、溶胀温度30℃、搅拌速度为150r/min时,可制得平均粒径为6.20μm且单分散性较好的高交联聚苯乙烯微球。A two-step swelling procedure was adopted to synthesize mono-dispersed and high cross-linked poly （styrene-divinylbenzene） particles with polystyrene micro-spheres （ 1. 80 μm in diam）, which were prepared by a dispersion polymerization method and used as seeds. The effects of monomer concentration, the ratio of ethanol to water, swelling agents, crosslinking agents, swelling temperature and agitation speed to particle size were discussed in detail. The morphologies and size distributions of these micro-spheres were examined by SEM and PSA. The Ts of the micro-spheres was tested by DSC. The results indicate that the particles （6. 20 μm in diam） exhibited excellent mono-dispersed property and high crosslinking degree when the conditions were that the concentration of the swelling agent and crosslinking agent was 25% and 23% , the swelling temperature was 30 ℃, and the stirring speed was 150 r/min.

关 键 词：分散聚合 种子溶胀法 单分散 交联聚苯乙烯微球 

分 类 号：O631[理学—高分子化学]