幅拘束一軸延伸シンジオタクチックポリプロピレンおよびシンジオタクチック1,2ポリブタジエンフイルムの複屈折変化
Change of Birefringence for Strip-biaxial Stretching of Syndiotactic Polypropylene and Syndiotactic 1, 2-Polybutadiene Films
波多野靖・川上恒夫・日比貞雄・長屋啓次・京塚修司・永田紳一
Hatano, Yasushi / Kawakami, Tsuneo / Hibi, Sadao / Nagaya, Keiji / Kyozuka, Shuji / Nagata, Shinichi
Strip-biaxially stretched syndiotactic polypropylene and syndiotactic 1, 2-polybutadiene films have been characterized by crystallinity and birefringence. Birefringence values for the polypropylene and polybutadiene films indicated positive and negative values, respectively. A good correlation between birefringence measurements by Abbe, polarization microscope and optical birefringence analyzer was obtained. Moreover, we confirmed the correlation between birefringence by Abbe and microwave measurements for the polypropylene film.
Key words: Syndiotactic polypropylene / Syndiotactic 1,2-polybutadiene / Birefringence / Correlation