Synthesis of polystyrene microspheres via RAFT dispersion polymerization

被引：1
作者：
Guo, Ruiwei [1 ]
Han, Kaixue [1 ]
Cao, Bin [1 ]
Zhang, Jianhua [1 ]
机构：
[1] School of Chemical Engineering and Technology, Tianjin University, Tianjin
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2015年 / 48卷 / 07期
关键词：
Dispersion polymerization; Particle size; Polystyrene microspheres; RAFT polymerization;
D O I：
10.11784/tdxbz201403096
中图分类号：
学科分类号：
摘要：
The reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization in the presence of macro-RAFT agent combined the advantages of heterogeneous controlled/living radical polymerization and self-assembly of block copolymers, which has been paid considerable attention. In this study, the macro-RAFT agent poly N, N-dimethyl acrylamide (PDMA) prepared by RAFT polymerization was used as stabilizer in the dispersion polymerization of styrene. The effect of PDMA on particle size was studied in detail. The results indicate that PDMA with higher molecular mass will produce larger particles but the particle size will decrease with the increase of the content of PDMA. Monodisperse polymer particles with size in the range of 200-500 nm can be obtained when the mass fraction of water in the mixture of ethanol and water was lower than 50%. The changes of particle size, conversion of styrene and molecular mass of resultant polymers in the process of styrene dispersion polymerization were investigated. The results suggest that the styrene dispersion polymerization in the presence of macro-RAFT agent PDMA has three stages, including homogeneous polymerization, nucleation and particle growth. With the chain propagation of polystyrene (PSt) chain in block copolymer, the PDMA-PSt particles were obtained. ©, 2015, Tianjin University. All right reserved.
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页码：614 / 619
页数：5
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