Patent ID: 7157523

Claim:
A ring-opened polynorbornene comprising a structural unit (I) represented by the following general formula (I): wherein in the general formula (I), m is 0, n is 1, X 1 means an ethylene group, R 1 and R 2 denote, independently of each other, a hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 30 carbon atoms, and R 3 represents a group represented by the following general formula (I-1) or a group represented by the following general formula (I-2): wherein in the general formulae (I-1) and (I-2), R 11 to R 27 denote, independently of one another, a hydrogen atom; a halogen atom; a substituted or unsubstituted hydrocarbon group having 1 to 30 carbon atoms, which may have a linkage containing or not containing oxygen, sulfur, nitrogen and/or silicon atom(s); or a polar group, p and q in the general formula (I-1) are individually 0 or a positive integer, with the proviso that when both p and q are 0, R 12 and R 15 , or R 19 and R 15 may be bonded to each other to form a carbon ring or heterocyclic ring, and the carbon ring or heterocyclic ring may be either a monocyclic structure or a polycyclic structure, and s in the general formula (I-2) is 0 or an integer of 1 or greater.