초록
polyacrylonitrile의 성질 개선의 일환으로 polyacrylonitrile에 caprolactamate(MgBr.N(CH$_2$)5CO)를 개시제로 하여 $\varepsilon$-caprolactam을 음 ion개환 graft 공중합시킴으로써 물리화학적 성질의 개선을 시도하였다. 우선 acrylonitrile과 vinyl pyrrolidone의 공중합체를 얻고 다음 $\varepsilon$-caprolactam을 음ion 개환 graft 공중합시켰다. 원소 분석 결과 graft 중합된 $\varepsilon$-caprolactam의 평균 repeating unit수는 14-16정도였다. graft 공중합체의 산성염료(Acid Orange II)에 대한 염색성을 고찰한 결과 산성염료에 대한 염색성이 크게 증진되었다. 인장감도는 acrylonitrile-vinyl pyrrolidone 공중합체 경우보다 graft 공중합체가 상당히 컸다. 한편 고유 점도는 acrylonitrile-vinyl pyrrolidone 공중합체 경우보다 graft 공중합체의 경우가 0.4-0.6정도 크고, 흡습성, 제전성은 도리어 acrylonitrile-vinyl pyrrolidone 공중합체 경우보다는 떨어지는 경향을 보였다.
To improve the physical and chemical properties of polyacrylonitrile, anionic ring-opening graft copolymerization of $\varepsilon$-caprolactam onto polyacrylonitrile has been carried out with caprolactamate (MgBr.N(CH2)5CO) as an initiator. In the first place, acrylonitrile-vinyl pyrrolidone copolymer was copolymerized with the various mole percentage of vinyl pyrrolidone and then anionic ring-opening graft copolymerization of $\varepsilon$-caprolactam was performed. In consequence of elementary analysis, the average number of repeating unit of grafted polymer was 14-16 or so. The dyeability to acid dye (Acid Orange II) of the graft copolymer was to a great extent improved. The tensile strength of graft copolymer was a great deal larger than that of acrylonitrile vinyl pyrrolidone copolymer. The inherent viscosity of graft copolymer was larger than that of acrylonitrile-vinyl pyrrolidone copolymer by 0.4 to 0.6, whereas the moisture regain and the antistatic property of graft copolymer were increase smaller than those of acrylonitrile-vinyl pyrrolidone copolymer.