Oriented optically transparent crystalline syndiotatic vinylaromatic
polymer
    1.
    发明授权
    Oriented optically transparent crystalline syndiotatic vinylaromatic polymer 失效
    定向光学透明的结晶间同乙烯基芳族聚合物

    公开(公告)号:US4959435A

    公开(公告)日:1990-09-25

    申请号:US341870

    申请日:1989-04-24

    IPC分类号: B29C55/00

    CPC分类号: B29C55/005 B29K2025/00

    摘要: Oriented, syndiotactic, optically transparent vinylaromatic polymers are prepared by a process comprising heating the polymer to a temperature above its crystalline melting point, cooling the polymer to a temperature less than an orientable temperature at a rate sufficient to avoid substantial crystal formation, and inducing strain into the polymer while at a orientable temperature to induce crystal formation and molecular orientation.

    摘要翻译: 定向的,间同立构的,光学透明的乙烯基芳族聚合物通过包括将聚合物加热到高于其结晶熔点的温度的方法来制备,将聚合物以足以避免大量晶体形成的速率将聚合物冷却至小于定向温度的温度, 在定向温度下进入聚合物以诱导晶体形成和分子取向。

    Process for preparing an oriented crystalline syndiotactic vinylaromatic
polymer
    2.
    发明授权
    Process for preparing an oriented crystalline syndiotactic vinylaromatic polymer 失效
    制备定向结晶间同立构乙烯基芳族聚合物的方法

    公开(公告)号:US4824629A

    公开(公告)日:1989-04-25

    申请号:US152126

    申请日:1988-02-04

    IPC分类号: B29C55/00 B29C55/02

    CPC分类号: B29C55/005 B29K2025/00

    摘要: Oriented, syndiotactic, optically transparent vinylaromatic polymers are prepared by a process comprising heating the polymer to a temperature above its crystalline melting point, cooling the polymer to a temperature less than an orientable temperature at a rate sufficient to avoid substantial crystal formation, and inducing strain into the polymer while at a orientable temperature to induce crystal formation and molecular orientation.

    摘要翻译: 定向的,间同立构的,光学透明的乙烯基芳族聚合物通过包括将聚合物加热到高于其结晶熔点的温度的方法来制备,将聚合物以足以避免大量晶体形成的速率将聚合物冷却至小于定向温度的温度, 在定向温度下进入聚合物以诱导晶体形成和分子取向。