| Abstract: | The influence of the addition of ethylene on the γ-ray-induced alternating copolymerization of ethylenimine and carbon monoxide was investigated. A mixture of ethylenimine, carbon monoxide, and ethylene was irradiated to produce a polymer containing these monomeric units. The infrared spectrum of the copolymer showed the characteristic absorption peaks of the secondary amide and ketone bond and was different from that of the reaction product of polyketone with ethylenimine and that of the γ-ray irradiation product of ethylene and poly-ß-alanine. The x-ray diffraction diagram of the copolymer was different from those of poly-ß-alanine and polyketone and exhibited an amorphous structure. Paper chromatographic analysis showed that the hydrolysis product of the copolymer contained ß-alanine and δ-aminovaleric acid. These results indicate that terpolymerization of ethylenimine, carbon monoxide, and ethylene took place under γ-ray irradiation and gave an amorphous polymer containing the units documentclass{article}pagestyle{empty}begin{document}$ rlap{} ({rm CH}_{rm 2} {rm CH}_{rm 2} {rm NHCO}rlap{}),rlap{} ({rm CH}_{rm 2} {rm CH}_{rm 2} {rm CO}rlap{}),{rm and}rlap{} ({rm CH}_{rm 2} {rm CH}_{rm 2} {rm CH}_{rm 2} {rm CH}_{rm 2} {rm NHCO}rlap{}) $end{document} |
