Polymerization of methyl methacrylate by 2-pyrrolidinone and n-dodecyl mercaptan

Yu Hsiang Hu, Chuh Yung Chen

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

The bulk polymerization of methyl methacrylate initiated with 2-pyrrolidinone and n-dodecyl mercaptan (R-SH) has been explored. This polymerization system showed "living" characteristics; for example, the molecular weight of the resulting polymers increased with reaction time by gel permeation chromatographic analysis. Also, the polymer was characterized by Fourier transform infrared spectroscopy, 1H NMR, and 13C NMR techniques. The polymer end with the iniferter structures was found. By the initial-rate method, the polymerization rate depended on [2-pyrrolidinone]1.0 and [R-SH]0. Combining the structure analysis and the polymerization-rate expression, a possible mechanism was proposed. n-Dodecyl mercaptan served dual roles - as a catalyst at low conversion and as a chain-transfer agent at high conversion. Finally, the thermal properties were studied, and the glass-transition temperature and thermal-degradation temperature were, respectively, 25 and 80-100°C higher than that of the azobisisobutyronitrile system.

原文English
頁(從 - 到)3692-3702
頁數11
期刊Journal of Polymer Science, Part A: Polymer Chemistry
40
發行號21
DOIs
出版狀態Published - 2002 11月 1

All Science Journal Classification (ASJC) codes

  • 聚合物和塑料
  • 有機化學
  • 材料化學

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