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1. 发明授权

US5707719A Oriented film including polystyrene polymer having syndiotactic configuration 失效
标题翻译：取向膜包括具有间同构型的聚苯乙烯聚合物
公开(公告)号：US5707719A
公开(公告)日：1998-01-13
申请号：US654583
申请日：1996-05-29
申请人： Tomonori Yoshinaga , Naonobu Oda , Tadashi Okudaira
发明人： Tomonori Yoshinaga , Naonobu Oda , Tadashi Okudaira
IPC分类号： B29C55/14 , B29D7/01 , B32B3/26 , B32B7/12
CPC分类号： B29C55/14 , B29D7/01 , B29K2025/00 , Y10S428/91 , Y10T428/268 , Y10T428/269
摘要： An oriented polystyrene film including a polystyrene polymer having a syndiotactic configuration, the film having a thickness of 25 .mu.m or more, and a rectangular sample of the film having a value C expressed by equation (I) of 0.007 or less: ##EQU1## wherein A.sub.max is obtained by designating four squares respectively in four apices of the rectangular sample, each square having sides of 100 mm in length, and setting an orientation direction of molecules of a first square to 0.degree., A.sub.max being an absolute value of a maximum angle among angles defined by the orientation direction of molecules of the first square and an orientation direction of molecules of each of the other three squares, R is expressed by equation (II) but is defined as 1 when exceeding 1: R=D/1000 (II), and D is a distance (mm) between a center of gravity of the first square and a center of gravity of the square having the orientation direction which defines A.sub.max with the first square, and HS.sub.max is a size change ratio of a square sample which is cut from the rectangular sample and dry-heated at a temperature of 150.degree. C. for 30 minutes, the square sample being designated in an apex of the rectangular sample and having sides of 100 mm in length.
摘要翻译：包含具有间同立构构型的聚苯乙烯聚合物的膜的取向聚苯乙烯膜，厚度为25μm以上的膜和由式（I）表示的值C的膜的矩形样品为0.007以下：＆lt; IMAGE＆gt; （I）其中通过在矩形样品的四个顶点中分别指定四个正方形来获得Amax，每个正方形具有100mm长的边，并将第一个正方形的分子的取向方向设定为0°，Amax为绝对值在由第一正方形的分子的取向方向和其他三个正方形中的每一个的分子的取向方向限定的角度之间的最大角度R由等式（II）表示，但是当超过1时被定义为1：R = D / 1000（II），D是第一正方形的重心与具有定义方向的方位的重心之间的距离（mm），其定义为具有第一平方的Amax，HSmax是尺寸变化慧慧从矩形样品切割并在150℃温度下干热30分钟的正方形样品，方形样品指定在矩形样品的顶点中，长度为100mm的边。

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