Miniemulsion polymerization—a comparative study of preparative variables
Miniemulsion polymerization—a comparative study of preparative variables
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DOI：
10.1002/app.1991.070430604
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发表时间：
1991-09
影响因子：
3
通讯作者：
P. L. Tang;E. Sudoł;C. Silebi;M. El-Aasser
中科院分区：
文献类型：
--
作者：
P. L. Tang;E. Sudoł;C. Silebi;M. El-Aasser
在水中制备单体微乳液的条件不同，导致聚合动力学和最终颗粒大小和分布有很大差异。这些变化包括(1)表面活性剂的数量和类型；(2)助表面活性剂的数量和类型；(3)单体(S)的类型；(4)制备和聚合的温度；(5)均质的方法和条件；(6)乳液的老化程度。为了统一以前工作中一些不同的信息，以苯乙烯为油相，十二烷基硫酸钠为表面活性剂，对上述一些变量进行了系统的研究。根据所得到的聚合动力学和粒子大小，得出以下结论：(1)使用助表面活性剂；(2)在高温下均质；(3)使用均匀的高剪切装置(微流化器)进行均质；(4)限制聚合前的老化时间。
Variations in the conditions used to prepare miniemulsions of monomers in water have resulted in substantial differences in polymerization kinetics and final particle sizes and distributions. These variations have included (1) surfactant amount and type; (2) cosurfactant amount and type; (3) monomer (s) type; (4) temperature of preparation and polymerization; (5) means and conditions of homogenization; and (6) degree of aging of the emulsion. In an effort to unify some of the disparate information of previous work, a systematic study of some of the above variables was undertaken using styrene as the oil phase with sodium lauryl sulfate as surfactant. Based on the polymerization kinetics and particle sizes obtained, the following conclusions are drawn: The finest droplet size miniemulsions are obtained by (1) using a cosurfactant; (2) homogenizing at elevated temperature; (3) homogenizing using a uniform high shear device (Microfluidizer); and (4) limiting the aging time prior to polymerization.