THERMOPLASTIC NORBORNENE-BASED POLYMER AND EPOXY GROUP-CONTAINING NORBORNENE-BASED POLYMER

PROBLEM TO BE SOLVED: To obtain the subject polymer excellent in electric insulation, heat resistance, etc., by compounding specific two kinds of recurrent units at a specific ratio and specifying a number average molecular weight. SOLUTION: This polymer has a recurrent unit A of formula I [(a) and (b) are each 0-2; (c) is 1, 2; R to R are each H or a (polar group-substituted) hydrocarbon, etc., one or more of R to R are alkenyl, etc., or R and R , R and R or R and R are linked to each other to form one or more alkylidene, etc.] and a recurrent unit B of formula II [(d) and (g) are each 0-2; R to R are each H or a (polar group-substituted) hydrocarbon, etc., one or more of R to R are alkenyl, etc., or R and R , and R , R and R or R and R are linked to each other to form one or more alkylidene, etc., or R and R are linked to each other and form a CC double bond between two carbons on which the R and the R are respectively linked] at a ratio A:B=(100:0) to (30:70), and a number-average molecular weight of 500 to 500,000.