Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces

高等学校化学研究 ›› 2002, Vol. 18 ›› Issue (1): 61-64.

Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces

CHEN Ming-qing¹, LIU Xiao-ya¹, YANG Cheng¹, AKASHI Mitsuru²

1. School of Chemical and Material Engineering, Southern Yangtze University, Wuxi 214036, P. R. China;
2. Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, Kagoshima 890-0065, Japan

收稿日期:2000-08-03 出版日期:2002-01-24 发布日期:2011-08-04
基金资助:
Supported by the Foundation for University Key Teacher by The Ministry of Education, P. R. China and was supported in part by the Grant-in-Aid for Scientific Research on Priority Areas, "New Polymers and Their Nano-Organized Systems"(No.277/10555325) from The Ministry of Education, Science, Sports and Culture, Japan.

Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces

CHEN Ming-qing¹, LIU Xiao-ya¹, YANG Cheng¹, AKASHI Mitsuru²

1. School of Chemical and Material Engineering, Southern Yangtze University, Wuxi 214036, P. R. China;
2. Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, Kagoshima 890-0065, Japan

Received:2000-08-03 Online:2002-01-24 Published:2011-08-04
Supported by:
Supported by the Foundation for University Key Teacher by The Ministry of Education, P. R. China and was supported in part by the Grant-in-Aid for Scientific Research on Priority Areas, "New Polymers and Their Nano-Organized Systems"(No.277/10555325) from The Ministry of Education, Science, Sports and Culture, Japan.

摘要/Abstract

摘要： A poly(tert-butyl methacrylate)(PBMA) macromonomer was synthesized by anionic polymerization with bis(2,6-di-t-butyl phenoxy) methyl aluminum [MeAl(ODBP)₂] as the initiator and trimethylsilylmethacrylate(TMSMA) as the end capping agent in dry THF. Then, a poly(methacrylic acid)(PMAA) macromonomer was obtained by means of hydrolysis reaction from the PBMA macromonomer in the presence of hydrochloric acid. The structures of the PBMA macromonomer were characterized by using ¹H NMR. It was found that the resulted PBMA macromonomer has highly isotactic properties and the PMAA macromonomer has an end vinyl group on per polymer chain. The monodisperse polymeric microspheres, which consisted of polystyrene cores and PMAA branches on their surfaces, were prepared by the dispersion copolymerization of styrene with the PMAA macromonomer in an ethanol/water mixed solvent. It was found that the concentration of the PMAA macromonomer would affect the microsphere formation, the morphology and its size in the copolymerization system.

关键词: Macromonomer, Isotactic structure, Dispersion copolymerization, Microsphere

Abstract: A poly(tert-butyl methacrylate)(PBMA) macromonomer was synthesized by anionic polymerization with bis(2,6-di-t-butyl phenoxy) methyl aluminum [MeAl(ODBP)₂] as the initiator and trimethylsilylmethacrylate(TMSMA) as the end capping agent in dry THF. Then, a poly(methacrylic acid)(PMAA) macromonomer was obtained by means of hydrolysis reaction from the PBMA macromonomer in the presence of hydrochloric acid. The structures of the PBMA macromonomer were characterized by using ¹H NMR. It was found that the resulted PBMA macromonomer has highly isotactic properties and the PMAA macromonomer has an end vinyl group on per polymer chain. The monodisperse polymeric microspheres, which consisted of polystyrene cores and PMAA branches on their surfaces, were prepared by the dispersion copolymerization of styrene with the PMAA macromonomer in an ethanol/water mixed solvent. It was found that the concentration of the PMAA macromonomer would affect the microsphere formation, the morphology and its size in the copolymerization system.

Key words: Macromonomer, Isotactic structure, Dispersion copolymerization, Microsphere

CHEN Ming-qing, LIU Xiao-ya, YANG Cheng, AKASHI Mitsuru. Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces[J]. 高等学校化学研究, 2002, 18(1): 61-64.

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Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces

Preparation and Characterization of Polymeric Microspheres Having Isotactic Poly(methacrylic acid) on Their Surfaces

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