发明授权
US5229474A Synthesis of two-dimensional polymers by molecular recognition and
chemical reaction among high molar mass monomers
失效
通过高摩尔质量单体之间的分子识别和化学反应合成二维聚合物
- 专利标题: Synthesis of two-dimensional polymers by molecular recognition and chemical reaction among high molar mass monomers
- 专利标题(中): 通过高摩尔质量单体之间的分子识别和化学反应合成二维聚合物
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申请号: US672478申请日: 1991-03-20
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公开(公告)号: US5229474A公开(公告)日: 1993-07-20
- 发明人: Samuel I. Stupp
- 申请人: Samuel I. Stupp
- 申请人地址: IL Urbana
- 专利权人: The Board of Trustees of the University of Illinois
- 当前专利权人: The Board of Trustees of the University of Illinois
- 当前专利权人地址: IL Urbana
- 主分类号: C08F20/36
- IPC分类号: C08F20/36 ; C09K19/38
摘要:
A new variety of side chain liquid crystal polymers. The macromolecules of these materials are comb-shaped and differ from conventional side-chain liquid crystal polymers in that the comb's teeth are longer and semi flexible. The oligomeric side chains contain a long flexible spacer not only at their junction with the backbone but also in the center of the mesogen. Specific features of the systems include monosubstitution of enantiotopic protons in the central spacer by a cyano group and a long alkoxy tail at the terminus. An unusual property of these materials is a lower liquid crystal-isotropic transition temperature relative to that of their monomeric precursors.
公开/授权文献
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