3, 4, 5-Trialkoxyphenyl isocyanate derivatives, in which alkoxy was dodecyloxy or methoxy, reacted with 4, 6-decadiyn-1, 10-diol and 5, 7-dodecadiyn-1, 12-diol, and four butadiyne derivatives with (N-trialkoxyphenyl) urethane groups were successfully synthesized. Their solid-state polymerization stimulated by UV or γ-ray irradiation was investigated. All monomers in crystals were found to be polymerizable. However, conversion was different ...