应用化学2012，Vol.29Issue(10)：1111-1116,6.DOI:10.3724/SP.J.1095.2012.00522
氯丁胶乳-聚甲基丙烯酸甲酯复合乳胶粒结构形态
Structure and Morphology of Polychloroprene-Polymethylmethacrylate Composite Latex Particles
摘要
Abstract
Polychloroprene-polymethylmethacrylate ( PCR-PMMA ) composite latex particles have been prepared through the seed emulsion polymerization with polychloroprene latex ( Pa) and methyl methacrylate (Pb) as the seed and monomer, respectively. Thermodynamic analysis results showed that when φb( volume fraction of polymer b) < 0. 69, the Pa-Pb core-shell latex particles and ( Pa + Pb ) separated latex particles were formed; while when φb > 0. 69, the inverted Pb-Pa core-shell latex particles and Pa-Pb core-shell latex particles were formed. Kinetic analysis results showed that the initiator type, the monomer feed type, crosslinking of the seed latex particles, and the monomer-to-rubber ratios were major factors influencing the particle morphology. When potassium persulfate was used as the initiator, the monomer-starved conditions led to the formation of normal core-shell particles, whereas flooded-feed MMA could not favor in formation of typical core-shell particle. While when azobisisobutyronitrile (AIBN) was used as die initiator, it led to the formation of inverted core-shell particles no matter if monomer-starved or flooded condition was used. Crosslinking of the polychloroprene seed particles was found to favor to form obvious core-shell PCR-PMMA particles. With the monomer-to-rubber ratio increasing, the shell layer turned thicker, the composite latex particle still showed core-shell structure, which was in agreement with the predicted results of thermodynamic analysis. The inverted core-shell PCR-PMMA composite latex particles were gradually changed to interpenetrating structure as the amount of monomer was increased when AIBN was used.关键词
乳胶粒形态/热力学/动力学/种子乳液聚合Key words
latex particle morphology/ thermodynamic/ kinetic/ seeded emulsion polymerization分类
化学化工引用本文复制引用
张凯,黄春保,沈慧芳,陈焕钦..氯丁胶乳-聚甲基丙烯酸甲酯复合乳胶粒结构形态[J].应用化学,2012,29(10):1111-1116,6.基金项目
湖北省自然科学基金面上项目(2010CDZ065),黄冈师范学院博士基金项目(09CD156) （2010CDZ065）
