carboxyl, halo, and acyl; and wherein R**(1) is the same as R except not H; and wherein each alkyl is independently selected from the group consisting of branched, unbranched and cyclical hydrocarbons having 1 to 12 carbon atoms; and wherein halo is bromo, iodo, chloro or fluoro; excluding the use of a pure dimer when X**(1) to X**(n) is substituted or unsubstituted phenyl or aryl, and(b) monomer