폴리에틸렌의 가교반응에 미치는 삼관능성 단위체와 산화장지제의 영향

Effect of Trifunctional Monomers and Antioxidants on the Crosslinking Reaction of Polyethylene

전자선을 이용하여 저밀도 폴리에틸렌을 가교시킬때의 삼관능성 단위체와 산화방지제의 효과를 검토하였다. 가교촉진제로서는 삼관능성 단량체인 Trimethylolpropane triacrylate(TMPTA), Trimethylolpropane trimethacrylate(TMPTM)과 Triallyl cyanurate(TAC)가 사용되었고, 산화방지제로서는 Irganox 1010(Pentaerythritol-tetrakist[3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionate]), Santo-nox R(4,4'-Thio-bis(3-methyl-6-t-butylphenol)), Nocrac D(N-phenyl-$\beta$-naphthylamine)와 Bisphenol A(4,4'-Iso-propylidene bisphenol)가 사용되었다. 삼관능성 단위체중에서 TMPTA가 폴리에틸렌의 가교도를 제일 크게 높였으며 또한 산화안정성도 부여했다. 산화방지제중에서 Nocrac D가 폴리에틸렌에 가장 적당한 것으로 나타났다.

The crosslinking reaction and oxidative stability of low-density polyethylene were studied in the presence of trifunctional monomers and antioxidants with electron beam. The trifunctional monomers used in this study are Trimethylolpropane triacrylate(TMPTA), Trimethylolpropane trimethacrylate(TMPTM) and Triallyl cyanurate(TAC). And the antioxidants are Irganox 1010 (Pentaerythritoltetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionatel]), Santo-nox R(4,4'-Thio-bis(3-methyl-6-t-butylphenol)), Nocrac D(N-phenyl-$\beta$-naphthylamine) and Bis-phenol A(4,4'-Isopropylidene bisphenol). Among the monomers, TMPTA is the best crosslinking agent and prvides polyethylene with oxidative stability. Among the antioxidants, Nocrac D is the best antioxidant for polyethylene.