Atom-transfer radical polymerization to synthesize novel liquid crystalline diblock copolymers with polystyrene and mesogen-jacketed liquid crystal polymer segments

Hailiang Zhang, Yingfeng Tu, Xinhua Wan, Qi Feng Zhou, E. M. Woo

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

The synthesis of a series of new rod-coil diblock copolymers with different molecular weights and low polydispersity was achieved by atom transfer radical polymerization. The block architecture (coil-conformation of styrene segment and rigid-rod conformation of 2,5-bis[(4-methoxyphenyl)-oxycarbonyl]styrene segment) of the diblock copolymers was experimentally confirmed by proton nuclear magnetic resonance (1H NMR) and differential scanning calorimetry (DSC). The liquid crystalline behavior of the copolymers was studied using DSC and a polarized optical microscope (POM). It was found that the liquid crystalline behavior was dependent on the molecular-weight of the rigid segment. Only those copolymers with Mn of the rigid block beyond 9,300 g/mol could form liquid crystalline phases above the glass transition temperature of the rigid block.

原文English
頁(從 - 到)11-15
頁數5
期刊Journal of Polymer Research
9
發行號1
DOIs
出版狀態Published - 2002 三月

All Science Journal Classification (ASJC) codes

  • 聚合物和塑料
  • 有機化學
  • 材料化學

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