| 摘要 |
PURPOSE:To improve a display grade by obtaining optimum small spherulites even on a plain surface. CONSTITUTION:Phase sepn. of crystalline high polymers from each other after blending is resulted in some cases blending if straight chain crystalline high polymers and crystalline high polymers having branches are blended and are used for oriented films 8, 11 and if the crystalline high polymers to be blended are different aggregate polymers and, therefore, crystalline copolymers alternately having respective repeating units are added to these polymers in order to prevent such phase sepn, by which compatibility is enhanced. The molecular motion is suppressed by the crystalline high polymers having branches in such a manner and acts as a crystal nucleus, by which more crystal nuclei than usual are generated. The adjacent spherulites are hindered in growth with each other at the time of spherulite growth and the spherulite diameters are reduced. Then, the optimum smaller spherulites are realized even in the case of the smooth surface. The liquid crystal display element having an improved contrast ratio and high display grade free from a rough feel is thus obtd. |
