A novel norbornene derivative represented by a general formula (1m) shown below is provided. By conducting a ring opening polymerization of this norbornene derivative, or by performing a subsequent hydrogenation following the ring opening polymerization, a ring opening polymer or a hydrogenated product thereof with an excellent low birefringence can be obtained.
[wherein, at least one of R1 to R4 is a group selected from the group consisting of groups represented by a general formula (1-1) shown below and groups represented by a general formula (1-2) shown below]
[wherein, at least one of RA, RB and Z is a group represented by the formula -C(O)O-].
本发明提供了一种由下图所示通式(1m)表示的新型
降冰片烯衍
生物。通过对这种
降冰片烯衍
生物进行开环聚合反应,或在开环聚合反应后进行
氢化反应,可获得具有极佳低双折射性的开环
聚合物或其
氢化产物。
[其中,R1 至 R4 中至少有一个是选自下图所示通式(1-1)所代表的基团和下图所示通式(1-2)所代表的基团所组成的基团。]
[其中,
RA、RB 和 Z 中至少有一个是由式 -C(O)O- 所代表的基团]。