A polymer composition comprising, in copolymerized form, a monomer mixture of from 10 to 90 wt.% of one or more addition polymerizable arylcyclobutene-containing monomer A; from 5 to 70 wt.% of one or more aromatic addition polymerizable second monomers chosen from styrene, α-methyl styrene, allyloxystyrene, allyl terminated polyarylene ethers or maleimide terminated polyarylene ethers; and from 5 to 40 wt.% of one or more nitrogen heterocycle containing addition polymerizable third monomers chosen from vinyl pyridine and vinyl imidazole; wherein monomer A has Structure A: wherein K is a covalent bond or a divalent group chosen from a C 1 to C 6 alkyl substituted or unsubstituted divalent aryl group, a C 1 to C 6 alkyl substituted or unsubstituted divalent heteroaryl group, C 1- C 30 divalent alkyl group, a C 1- C 30 heteroatom containing alkyl group, a divalent C 1 to C 30 alkylene group, a carbonyl group, an ether group, a thioether group, an ester group, a carboxyl group, or a cyano group; M is a divalent aromatic group chosen from a C 1 to C 6 alkyl substituted or unsubstituted divalent aryl group, a C 1 to C 6 alkyl substituted or unsubstituted divalent heteroaryl group; L 1 is selected from a covalent bond or a hydrocarbon linking group having a valence of x +1, wherein; R 1 through R 6 are each independently selected from a monovalent group chosen from hydrogen, deuterium, halogen, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkyl substituted hydrocarbon group, a heteroatom containing hydrocarbon group, a C 1 to C 6 alkyl substituted heterohydrocarbon group, a cyano group, a C 6 to C 12 aryl group, C 1 to C 6 alkyl substituted aryl group, a heteroaryl group, or a C 1 to C 6 alkyl substituted heteroaryl group, wherein at least one of R 1, R 2 and R 3 is chosen from a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkyl substituted hydrocarbon group, a heteroatom containing hydrocarbon group, a C 1 to C 6 alkyl substituted heterohydrocarbon group, a cyano group, a C 6 to C 12 aryl group, C 1 to C 6 alkyl substituted aryl group, a heteroaryl group, or a C 1 to C 6 alkyl substituted heteroaryl group; and x and y are each independently an integer from 1 to 5 wherein y is 1 when L 1 is a covalent bond; wherein all weights based on the total solids weight of monomers used to make the copolymer with all monomer wt.%s adding to 100%. M is a divalent aromatic group chosen from a C 1 to C 6 alkyl substituted or unsubstituted divalent aryl group, a C 1 to C 6 alkyl substituted or unsubstituted divalent heteroaryl group; L 1 is selected from a covalent bond or a hydrocarbon linking group having a valence of x +1, wherein; R 1 through R 6 are each independently selected from a monovalent group chosen from hydrogen, deuterium, halogen, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkyl substituted hydrocarbon group, a heteroatom containing hydrocarbon group, a C 1 to C 6 alkyl substituted heterohydrocarbon group, a cyano group, a C 6 to C 12 aryl group, C 1 to C 6 alkyl substituted aryl group, a heteroaryl group, or a C 1 to C 6 alkyl substituted heteroaryl group, wherein at least one of R 1, R 2 and R 3 is chosen from a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkyl substituted hydrocarbon group, a heteroatom containing hydrocarbon group, a C 1 to C 6 alkyl substituted heterohydrocarbon group, a cyano group, a C 6 to C 12 aryl group, C 1 to C 6 alkyl substituted aryl group, a heteroaryl group, or a C 1 to C 6 alkyl substituted heteroaryl group; and x and y are each independently an integer from 1 to 5 wherein y is 1 when L 1 is a covalent bond; wherein all weights based on the total solids weight of monomers used to make the copolymer with all monomer wt.%s adding to 100%.