第44卷第11期
2016年11月【科研与生产】
聚氯乙烯 Polyvinyl Chloride
氟乙烯微悬浮聚合成粒机制探讨贾瑞1，黄健2，包永忠"，宋义虎”，刘明杰”，周爱存（1.浙江大学化学工程国家重点实验室，浙江杭州310027；
2.浙江大学高分子系，浙江杭州310027；
3.唐山三友氟碱有限责任公司，河北唐山063305）
[关键调】氧乙烯；微悬浮聚合；成粒；溶胀；粒度分布
Vol.44,No.11 Nov.,2016
[摘要】以不同均化方式得到微悬浮分散减，再经微悬浮案合制备了PVC糊树脂。首先以三氯乙烯为氯乙烯单体的模拟液，研究了十二烷基硫酸钠乳化剂/十六、十八混合醇助稳定剂复合胶束和单体亚微液滴的形成过程，发现复合胶束的形成过程和三氯乙婚溶胀进人复合胶束形成亚微液滴的过程均受扩傲动力学控制，延长溶胀时间及施加高速剪切分散可以强化溶胀过程，复合胶束对单体具有“超级溶胀”能力。然后采用搅拌溶胀和高速剪切微悬浮聚合得到PVC乳胶粒子，发现两者形粮相同，而前者粒径略大、分布略宽；延长搅拌落账时间，可使粒度分布更接近高速剪切均化微悬浮聚合得到的PVC乳胶粒子的粒度分布。
【中图分类号】TQ325.3
【文献标志码］B
[文章编号】10097937(2016)11-000706
Study on particle formation mechanism of vinyl chloride micro-suspension polymerization
JIARui',HUANG Jian",BAO Yongzhong',SONG Yihu,LIUMingjie",ZHOU Aicun
(1. State Key Laboratory of Chemical Engineering, Zhejiang University, Hangzhou 310027, China;
2.Department of Polymer Science, Zhejiang University,Hangzhou 310027,China;
3.Tangshan Sanyou Chlor Alkali Co., Ltd., Tangshan 063305, China)
Key words: vinyl chloride; micro-suspension polymerization; particle formation; swelling; size dis
tribution
Abstract: Poly(vinyl chloride) paste resin was prepared by micro-suspension polymerization of dis-persion formed by different homogenization ways. First, the formation of sodium dodecyl sulfate /cetyl alcohol and stearyl alcohol complex micelle and the formation of monomer submicro-droplets were studied through using trichloroethylene as the model of vinyl chloride. It was found that the formation of com-plex micelle and the formation of submicro-droplets via swelled trichloroethylene into the complex micelle were both diffusion-controlled process, the swelling process was intensified as swelling time increased or as high speed shear dispersion was applied, and the complex micelle exhibited super capacity to swell mono-mer.Then PVC latex particles were prepared by agitation and by high-speed shearing homogenization. It was found that PVC latex particles prepared by the above two methods exhibited similar morphology, while the average size of the PVC latex particles prepared by the first method was larger and the size distri-bution was wider. By prolonging swelling time, the size distribution of PVC latex particles could ap-
proach'that of PVC latex particles prepared by high-speed shearing homogenization.［收稿日期】2016-08-22
【作者简介】贾瑞（1992一），男，硕士，主要从事氯乙烯微悬浮案合案合研究。万方数据