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基于D,L-丙交酯开环聚合制备具有自分散能力的毛发状聚合物微球

王芳, 汪长春   

  1. 复旦大学高分子科学系, 聚合物分子工程教育部重点实验室, 上海 200433
  • 收稿日期:2006-12-27 修回日期:1900-01-01 出版日期:2007-06-10 发布日期:2007-06-10
  • 通讯作者: 汪长春

Preparation of Self-dispersible Hairy Polymer Particles Based on Ring-opening Polymerization of D,L-Lactide

WANG Fang, WANG Chang-Chun*   

  1. Key Laboratory of Molecular Engineering of Polymers, Minister of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
  • Received:2006-12-27 Revised:1900-01-01 Online:2007-06-10 Published:2007-06-10
  • Contact: WANG Chang-Chun

摘要: 通过无皂乳液聚合法制备了单分散苯乙烯与甲基丙烯酸羟乙酯共聚的交联微球[poly(St-co-HEMA)], 利用其活性羟基, 引发D,L-丙交酯单体的开环聚合, 制备出一种新型的疏水性毛发状微球, 并用扫描电子显微镜、红外光谱及热失重分析等技术表征微球结构. 结果表明, 采用此方法不但能够成功地制备出一系列具有不同壳层厚度的疏水性毛发状聚合物微球, 而且随着D,L-丙交酯单体用量的增加, 微球在有机溶剂中的分散能力显著提高. 实验结果证明, 该方法是一种在聚合物微球表面生成高效、可控接枝疏水性大分子链的新方法.

关键词: 疏水性毛发状微球, D,L-丙交酯, 开环聚合, 分散性, 接枝率

Abstract: A new type of polymeric particles with hydrophobic hairs of PLA was prepared via initiating ring-opening polymerization(ROP) of D,L-lactide from the polymeric core particles of polystyrene and poly(2-hydroxyethyl methacrylate)[poly(St-co-HEMA)]. Successful grafting and well-dispersible properties of the hairy particles were approved via thermogravimetric analysis(TGA), scanning electron microscopy(SEM) and Fourier transform infrared analysis(FTIR). The experimental results indicate that this grafting procedure is effective and controllable for the preparation of novel hydrophobic hairy particles. The presence of hairy shell on core particles resulted in dramatic improvement of its dispersibility in organic solvent.

Key words: Hydrophobic hairy particle, D,L-Lactide, Ring-opening polymerization, Dispersibility, Grafting efficiency

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