分散共聚合制备PSt-AA-EGDMA功能性单分散微米级交联微球的研究

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (2): 366.

分散共聚合制备PSt-AA-EGDMA功能性单分散微米级交联微球的研究

张洪涛, 吕睿, 陈敏

湖北大学化学与材料科学学院, 武汉 430062

收稿日期:2002-11-29 出版日期:2004-02-24 发布日期:2004-02-24
通讯作者: 张洪涛(1942年出生),男,研究员,主要从事高分子合成和乳液聚合的研究.E-mail;zhanghongtao2000@sina.com E-mail:zhanghongtao2000@sina.com
基金资助:
国家自然科学基金(批准号;20374019)资助

Studies on Dispersion Copolymerization of St-AA-EGDMA for Preparing Monodisperse Micron-size Functional Microspheres

ZHANG Hong-Tao, LÜ Rui, CHEN Min

Faculty of Chemistry and Materials Science, Hubei University, Wuhan 430062, China

Received:2002-11-29 Online:2004-02-24 Published:2004-02-24

摘要/Abstract

摘要： 以苯乙烯(St)为主单体,丙烯酸(AA)为功能单体,乙二醇二甲基双丙烯酸酯(EGDMA)为交联单体,聚乙烯吡咯烷酮(PVP)为稳定剂,偶氮二异丁腈(AIBN)为引发剂,乙醇/水混合溶剂为分散介质,用分散聚合法一步合成了功能性单分散大粒径(10～20μm)交联聚苯乙烯微球.研究了PSt-AA-EGDMA三元分散共聚合体系的动力学,由转化率-时间关联得到动力学方程;R_p=k[I]^0.13([St]^1.87+[AA]^0.13+[EGDMA]^0.2)·(1+[PVP]^0.2)exp(-E/RT).详细讨论了AA,EGDMA,PVP的浓度和溶剂极性对羧基分布的影响,阐述了AA和EGDMA对粒子形态、粒径及粒径分布的影响.

关键词: 分散聚合, 羧基, 聚合物微球, 交联

Abstract: Dispersion copolymerization of styrene(St), acrylic acid(AA) as functional monomer and ethylene glycol dimethacrylate(EGDMA) as the crosslinking monomer was carried out in ethanol/water mixture as the media by using poly(N-vinylpyrrolidone)(PVP), 2,2-azo-bisisobutyronitrile(AIBN) as the stabilizer and initiator, respectively. Monodisperse micron-size crosslinked polystyrene microspheres-containing carboxyl were directly prepared by one-step method of dispersion copolymerization. Polymerization kinetics was researched and kinetics formula, R_p=k[I]^0.13([St]^1.87+[AA]^0.13+[EGDMA]^0.2)·({1+[PVP]^0.2)exp(-E/RT), was rendered. The effects of concentration of AA, EGDMA, PVP and solvent polarity on the carboxyl distribution were discussed in detail. The effects of concentration of AA and EGDMA on particle morphology, particle size and size distribution and carboxyl distribution were also researched.

Key words: Dispersion polymerization, Carboxyl, Polymer microsphere, Crosslinking

中图分类号:

O631

TrendMD:

张洪涛, 吕睿, 陈敏. 分散共聚合制备PSt-AA-EGDMA功能性单分散微米级交联微球的研究. 高等学校化学学报, 2004, 25(2): 366.

ZHANG Hong-Tao, LÜ Rui, CHEN Min . Studies on Dispersion Copolymerization of St-AA-EGDMA for Preparing Monodisperse Micron-size Functional Microspheres. Chem. J. Chinese Universities, 2004, 25(2): 366.

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