Phase separation in the formation of hollow particles by suspension polymerization for divinylbenzene/toluene droplets dissolving polystyrene
Phase separation in the formation of hollow particles by suspension polymerization for divinylbenzene/toluene droplets dissolving polystyrene
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DOI：
10.1007/s00396-002-0748-2
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发表时间：
2003-02
影响因子：
2.4
通讯作者：
Y. Konishi;M. Okubo;H. Minami
中科院分区：
文献类型：
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作者：
Y. Konishi;M. Okubo;H. Minami
研究了二乙烯基苯/甲苯悬浮聚合体系中聚苯乙烯（PS）液滴的相分离行为，以阐明悬浮聚合中空聚合物粒子的形成机理。在低含量的低分子量PS下没有获得中空颗粒，其中在高转化率下发生相分离。另一方面，在高含量的高分子量PS下获得中空颗粒，其中在低转化率下发生相分离。PS和聚二乙烯基苯的交联促进了聚合反应早期的相分离，这是中空结构形成的关键因素。
Phase-separation behavior within polymerizing divinylbenzene/toluene droplet dissolving polystyrenes (PS) was investigated to clarify the formation mechanism of the hollow polymer particles by suspension polymerization. No hollow particles were obtained at a low content of low-molecular-weight PS where phase separation occurred at high conversion. On the other hand, hollow particles were obtained at a high content of high-molecular-weight PS where phase separation occurred at low conversion. The phase separation in an early stage of the polymerization, which was promoted by the presence of PS and cross-links of polydivinylbenzene, was a key factor for the formation of the hollow structure.