Specific examples include citrial, cinnamyl acetate, {TAIL ~ cinnamaldehyde}, 4 vinylphenyl cinnamates, 4 vinylphenyl, 4 nitrocinnamate, 4 isopropenylphenyl cinnamate, poly, poly{1 ethylene co 1 ethylene}, 3 acrolein), fumaric acid diethylester, fumaric acid dihexyl ester, maleic acid dibutylester, maleic acid diphenyl ester, N phenyl maleinide, N maleimide, m phenylenediamine bis, and {HEAD ~ N},N 1,3 phenylenedimaleimide, and polyfunctional maleimide polymer MP 2000 from Kennedy and Klim, Little Silver, N.J 