A cyclic olefin polymer is provided and includes a repeating unit represented by formula (1A) and a repeating unit represented by the formula (1B):
R
1
and R
3
each independently represents a substituent, L
1
and L
2
each independently represents a single bond or a divalent linking group, m and p each independently represents an integer of 0 or 1, and n and q each independently represents an integer of 1 to 4; and A represents COOR
2
or OCOR
2
, and R
2
represents a linear alkyl group having a carbon number of 1 to 10. The cyclic olefin polymer has a copolymerization ratio of x and y satisfying 0.03≦y/(x+y)≦0.50, a number average molecular weight of from 70,000 to 300,000, and a weight average molecular weight of from 200,000 to 700,000.
Cyclic Olefin-Based Polymer, and Optical Material, Polarizing Plate and Liquid Crystal Display Device Using the Same
申请人:Suzuki Ryo
公开号:US20090040436A1
公开(公告)日:2009-02-12
A cyclic olefin-based polymer containing a repeating unit represented by formula (1), an optical material containing the cyclic olefin-based polymer, a polarizing plate containing the optical material, and a liquid crystal display device containing the polarizing plate:
in which R
1
represents a substituent; L represents a single bond or a divalent linking group, and forms an alcohol together with the —OH group; p represents an integer of 0 or 1; q represents an integer of from 0 to 3; r represents an integer of from 1 to 4; and R
1
and L may be combined with each other to form a 5- to 7-membered ring.