Polycyclic-olefinic polymers containing olefinic functionality for forming low-loss films having improved thermal properties

A composition comprising:

• a) a polymer comprising:
• i) at least one first repeating unit represented by formula (IA), said first repeating unit is derived from a monomer of formula (I):
• wherein:
• denotes a place of bonding with another repeat unit;
• m is an integer 0, 1 or 2;
• R1, R2, R3 and R4 are the same or different and each independently selected from the group consisting of hydrogen, methyl, ethyl, linear or branched (C3-C16)alkyl, (C3-C10)cycloalkyl, (C6-C12)bicycloalkyl, (C6-C12)aryl and (C6-C12)aryl(C1-C6)alkyl;
• or
• one of R1 and R2 taken together with one of R3 and R4 and the carbon atoms to which they are attached to form a substituted or unsubstituted (C5-C14)cyclic, (C5-C14)bicyclic or (C5-C14)tricyclic ring;
• and
• ii) at least one second repeating unit represented by formula (IIA), said second repeating unit is derived from a monomer of formula (II):
• wherein:
• denotes a place of bonding with another repeat unit;
• n is an integer 0, 1 or 2;
• at least one of R5, R6, R7 and R8 is selected from the group consisting of methylidene, ethylidene, vinyl, linear or branched (C3-C16)alkenyl, (C3-C10)cycloalkenyl, (C6-C12)bicycloalkenyl and (C6-C12)aryl(C2-C16)alkenyl and the remaining R5, R6, R7 and R8 are the same or different and each independently selected from the group consisting of hydrogen, methyl, ethyl, linear or branched (C3-C16)alkyl, (C3-C10)cycloalkyl, (C6-C12)bicycloalkyl, (C6-C12)aryl and (C6-C12)aryl(C1-C6)alkyl;
• or
• one of R5 and R6 taken together with one of R7 and R8 and the carbon atoms to which they are attached to form a substituted or unsubstituted (C5-C14)cyclic, (C5-C14)bicyclic or (C5-C14)tricyclic ring containing at least one double bond;
• and
• wherein the second repeat unit is present at an amount not less than four mole percent based on total moles of first and second repeat units;
• b) a crosslinking agent selected from the group consisting of:
• and
• c) one or more additives selected from the group consisting of a tackifier and a free radical initiator.