Preparation of polystyrene/poly(methyl methacrylate) composite particles having a dent
Preparation of polystyrene/poly(methyl methacrylate) composite particles having a dent
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DOI：
10.1007/s00396-004-1209-x
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发表时间：
2005-03-01
影响因子：
2.4
通讯作者：
Fujibayashi, T
中科院分区：
文献类型：
--
作者：
Okubo, M;Saito, N;Fujibayashi, T
以聚乙烯醇（PVA）水溶液为分散介质，通过释放甲苯的方法制备了具有凹陷结构的非球形聚苯乙烯（PS）/聚甲基丙烯酸甲酯（PMMA）复合粒子。在聚合物/甲苯液滴的相分离过程中，随着甲苯的释放，形成了一种偏心的PS-核/PMMA-壳结构，其中一部分PS核与水介质接触，甲苯在PS核中的分配比在PMMA壳中的分配多。随着PS含量的增加和分配在PS核中的甲苯含量的增加，凹坑的体积变大。
Nonspherical polystyrene (PS)/poly(methyl methacrylate) (PMMA) composite particles having a dent were prepared by releasing toluene from PS/PMMA/toluene droplets dispersed in a poly(vinyl alcohol) aqueous medium. An ex-centered PS-core/PMMA-shell morphology, in which a part of the PS core contacted with the aqueous medium and toluene partitioned more in the PS core than in the PMMA shell, was formed in the polymers/toluene droplet in the process of phase separation therein with releasing toluene. The volume of the dent became bigger with an increase in the PS content and in the toluene content partitioned in the PS core.