RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Co(acac)2 Mediated Controlled Radical Copolymerization of Vinyl Acetate and Methyl Acrylate Initiated by Benzoyl Peroxide

        Mohammad Ali Semsarzadeh,Parisa Alamdari 한국고분자학회 2015 Macromolecular Research Vol.23 No.2

        Cobalt mediated radical copolymerization of vinyl acetate (VAc) and methyl acrylate (MA) was successfullyperformed in the presence of cobalt(II) acetylacetonate (Co(acac)2), dimethylformamide (DMF) and benzoylperoxide (BPO) as catalyst, cobalt coordinating agent and initiator, respectively, at 45 oC. The individual monomerconversion and comonomer composition of copolymers were determined by 1H NMR spectroscopy. Molecularweight (Mn) and its distribution (Mw/Mn) were analyzed by GPC technique. The time dependence of ln[M]0/[M], thevariation of molecular weight with respect to the conversion, and molecular weight distribution of copolymers werestudied to evaluate controlled characteristics of copolymerization. It was found that Co(acac)2 successfully mediatedthe radical copolymerization of VAc and MA. Moreover, copolymer molecular weight and copolymerization rateincreased with increasing initial MA ratio. The spectroscopy analysis revealed VAc content in the copolymerincreased with conversion regardless of VAc initial ratio, indicating a gradient sequence distribution of the copolymer.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼