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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (12): 1370-1374. 上一篇    下一篇

研究论文

改进的微乳液聚合制备的聚甲基丙烯酸甲酯的力学和光学性能研究

杨 东 薛 垠 胡建华* 府寿宽

  

  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 先进材料实验室 上海 200433)

  • 投稿日期:2009-01-05 修回日期:2009-01-22 发布日期:2009-06-28
  • 通讯作者: 胡建华

Mechanical and Optical Properties of PMMA Prepared by Modified Microemulsion Polymerization

Yang, Dong Xue, Yin Hu, Jianhua* Fu, Shoukuan

  

  1. (Key Laboratory of Molecular Engineering of Polymers (Ministry of Education) ＆ Laboratory of Advanced Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433)
  • Received:2009-01-05 Revised:2009-01-22 Published:2009-06-28
  • Contact: Hu Jian-Hua

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研究了改进的微乳液聚合方法制备的聚甲基丙烯酸甲酯(PMMA)的力学和光学性能, 并与本体聚合制备的PMMA相比较. 研究结果表明, 由改进的微乳液聚合制备的PMMA具有较高的Tg和富间规度, 在较宽的温度范围内具有较高的力学模量. 此外, 它的拉伸强度、拉伸模量及断裂伸长率均比本体聚合制备的PMMA样品高. PMMA的折光率与制备方法关系不大, 但由改进的微乳液聚合制备的PMMA样品消光系数更小, 更加透明. 这说明由改进的微乳液聚合方法制备的PMMA具有更广泛的应用前景.

关键词: 聚甲基丙烯酸甲酯, 改进的微乳液聚合, 本体聚合, 力学性能, 光学性能

The mechanical and optical properties of PMMA prepared by modified microemulsion polymerization (PMMA-MMP) have been investigated, and compared with those of PMMA prepared by bulk polymerization (PMMA-BP). The results show that PMMA-MMP possesses higher Tg, tacticity, and higher mechanical modulus in a wide temperature range than PMMA-BP. Furthermore, the tensile strength, tensile modulus and elongation at break of PMMA-MMP are higher than those of PMMA-BP. The refractive index of PMMA is little concerned with the preparation method, however, the extinction coefficient of PMMA-MMP is smaller than that of PMMA-BP, i.e. PMMA-MMP is more transparent. These results indicate that PMMA-MMP has greater potential in application.

Key words: polymethyl methacrylate, modified microemulsion polymerization, bulk polymerization, mechanical property, optical property