In more preferred embodiments, R1, R2, and R3 are the same and are methyl, ethyl, or propyl and R4 is phenyl. [0054] Illustrative examples of X and X1(or X1 and X depending on how the RMC 14 polymer is depicted) are: [0055] respectively where R5 and R6 are independently each hydrogen, alkyl, aryl, or heteroaryl; and Z is a photopolymerizable group. [0056] In preferred embodiments, R5 and R6 are in