| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a film stretchable at an industrially appropriate temperature and manifesting wide-ranging retardation. <P>SOLUTION: The film is comprised of a norbornene polymer having a recurring unit represented by general formula (1). In formula (1), L is a single bond or a 1-10C alkylene group; R is a 2-10C alkyl group; and R<SP>1</SP>, R<SP>2</SP>and R<SP>3</SP>are each a hydrogen atom or a substituent group. <P>COPYRIGHT: (C)2008,JPO&INPIT |
