Photoinitiated dispersion polymerization using polyurethane based macrophotoinitiator as stabilizer and photoinitiator
Photoinitiated dispersion polymerization using polyurethane based macrophotoinitiator as stabilizer and photoinitiator
复制标题
使用聚氨酯基大分子光引发剂作为稳定剂和光引发剂的光引发分散聚合
DOI：
10.1016/j.polymer.2010.05.052
复制
发表时间：
2010-07
期刊：
影响因子：
4.6
通讯作者：
Zhu, Yedan
中科院分区：
文献类型：
--
作者：
Wu, Bo;Zeng, Zhaohua;Tan, Jianbo;Yang, Jianwen;Zhu, Yedan
设计合成了聚氨酯大分子光引发剂（PU-PI），并将其应用于甲基丙烯酸甲酯（MMA）的光引发分散聚合，以乙醇/水为反应介质。在室温下，紫外光照射25 min，聚合物转化率可达90%以上，得到了单分散的PMMA微球。用XPS对微球的结构进行了分析，发现微球表面约有50%被稳定剂覆盖。由于独特的稳定过程，PU-PI在光引发分散聚合中有效地稳定了聚合物颗粒。微球的尺寸和尺寸分布对反应条件如稳定剂/引发剂浓度、初始单体浓度和反应介质变得不敏感。在不同的反应条件下，所得微球的粒径在0.88 ~ 1.06 μm之间变化，多分散指数最低为1.011。该研究为制备单分散的功能性表面修饰微球提供了一种快速简便的方法。
Polyurethane based macrophotoinitiator (PU-PI) had been designed and synthesized, and applied to photoinitiated dispersion polymerization of methyl methacrylate as both photoinitiator and stabilizer, with ethanol/water mixture as reaction medium. Monomer conversion over 90% was achieved within 25 min of UV irradiation at room temperature, and monodisperse PMMA microspheres were obtained. The structure of the microspheres had been analyzed by XPS, showing that about 50% of surface of the microspheres were covered with the stabilizer. PU-PI effectively stabilized the polymeric particles in photoinitiated dispersion polymerization due to the unique stabilization process. The size and size distribution of the microspheres became insensitive to the reaction condition such as stabilizer/initiator concentration, initial monomer concentration and reaction medium. The size of the microspheres obtained changed in the range from 0.88 μm to 1.06 μm at different reaction condition, with polydispersity index as low as 1.011. The research may provide a quick and facile approach to prepare monodisperse microspheres with tailored functional surface.
登录
查看更多内容
影响因子：
4.6
作者：
M. Muranaka;T. Ono
通讯作者：
M. Muranaka;T. Ono
影响因子：
--
作者：
H. Kawaguchi;Y. Isono;Sakiko Tsuji
通讯作者：
H. Kawaguchi;Y. Isono;Sakiko Tsuji
影响因子：
3.9
作者：
B. Ray;B. Mandal
通讯作者：
B. Ray;B. Mandal
影响因子：
4.6
作者：
Jenny Goldshtein;S. Margel
通讯作者：
Jenny Goldshtein;S. Margel
影响因子：
15.1
作者：
Zhenqi Chang;Gang Liu;Fang Fang-Fang;Yangchao Tian;Zhicheng Zhang
通讯作者：
Zhenqi Chang;Gang Liu;Fang Fang-Fang;Yangchao Tian;Zhicheng Zhang