Copolymerization of Diethyl ${\alpha}$-Phenylvinyl Phosphate with Acrylonitrile and Maleic Anhydride

디에틸 ${\alpha}$-페닐비닐인산과 아크릴로니트릴 및 말레산무수물의 자유라디칼 혼성중합

  • Jung-Il Jin (Department of Chemistry, Korea University) ;
  • Hong-Ku Shim (Department of Chemistry, Korea University) ;
  • Soo-Min Lee (Department of Chemistry, Han Nam College)
  • 진정일 (고려대학교 이과대학 화학과) ;
  • 심홍구 (고려대학교 이과대학 화학과) ;
  • 이수민 (한남대학 화학과)
  • Published : 1983.08.20

Abstract

Free radical-initiated copolymerizations of diethyl ${\alpha}$-phenylvinyl phospbate (DEPVP) with acrylonitrile (AN) and maleic anhydride (MAnh) were studied. The monomer reactivity ratios for AN/DEPVP pair, determined at $70^{\circ}C$ in bulk using benzoyl peroxide as an initiator, were;$ r_1(AN) = 0.77, r_2(DEPVP) = 0.002$. The values of the Alfrey-Price constants, Q and e, for DEPVP were calculated to be 0.012 and -1.35, respectively. Free radical-initiated copolymerization of MAnh/DEPVP pair in chloroform at $70^{\circ}C$ produced 1 : 1 alternating copolymers regardless monomer feed composition with the highest copolymerization rate at the molar ratio of MAnh : DEPVP = 7 : 3. The equilibrium constant of a charge-transfer complex between DEPVP and MAnh in deutrated chloroform, determinated at room temperature by transformed Benesi-Hildebrand NMR method, was 0.085 l/mol. The reduced viscosity of copolymers of AN/DEPVP pair decreased as the content of DEPVP units increased, while that of MAnh/DEPVP pair remained more or less constant.

Keywords

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