Reactive surfactants in heterophase polymerization
Reactive surfactants in heterophase polymerization
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DOI：
10.1007/bf00655683
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发表时间：
1996-12
影响因子：
2.4
通讯作者：
P. Lacroix-Desmazes;A. Guyot
中科院分区：
文献类型：
--
作者：
P. Lacroix-Desmazes;A. Guyot
本文研究了甲基丙烯酸甲酯和苯乙烯在醇-水混合溶剂中分散聚合时聚合物粒子的形成机理。甲基丙烯酸类聚（环氧乙烷）大分子单体和聚（乙烯基吡咯烷酮）已被用作空间稳定剂。动态光散射以及透射电子显微镜已被应用于确定在聚合反应开始时的平均粒径的演变。检测到直径为80至400 nm的稳定核。成核过程是相当迅速的，并在小于0.1%的单体转化率内完成。实验结果与由潘恩[（1990）Macromolecules 23：3109]开发的聚结多箱动力学模型预测的结果进行了比较。
The mechanism for the formation of polymer particles in the dispersion polymerization of methyl methacrylate and styrene in alcohol-water mixtures has been investigated. Methacrylic based poly(ethylene oxide) macromonomers and poly(vinyl-pyrrolidone) have been used as steric stabilizers. Dynamic light scattering as well as transmission electron microscopy have been applied to determine the evolution of the average particle size at the beginning of the polymerization. Stable nuclei from 80 to 400 nm in diameter size were detected. The nucleation process was quite rapid and completed within less thanca.0.1% monomer conversion. The experimental results are compared with those predicted by the multibin kinetics model for coalescence developed by Paine [(1990) Macromolecules 23: 3109].