Article
  • Tacticity Analysis and the Nature of Active Propagating Species in the Living Cationic Polymerization of Alky Vinyl Ethers Initiated by HI/I2 Catalyst
  • Cho CG, McGrath JE
  • HI/I2 촉매로 중합되는 Alkyl Vinyl Ether의 양이온 리빙 중합에 있어서 Tacticity 본석으로 본 중합활성점의 구조적 특성
  • 조창기, McGrath JE
Abstract
Ethyl vinyl ether(EVE) and n-butyl vinyl ether(nBVE) were polymerized by HI/I2 catalyst under living polymerization conditions, and the tacticities of the obtained polymers were determined by carbon-13 NMR spectroscopy. The tacticity result was analyzed and compared with reported data which were obtained from nonliving polymerization systems catalyzed by BF3OEt2 or SbCl5. Sequence distribution of a polymer obtained with HI/I2 catalyst did not follow Bernoullian statistics, whereas that of the polymer obtained from BF3OEt2 catalyst system followed the random statistics. As the polymerization temperature decreased, the isotacticity of the polymer obtained increased, and the deviation from random statistics became larger.

리빙 중합조건하에서 HI/I2 촉매에 의하여 합성된 poly(ethyl vinyl ether)와 poly(n-butyl vinyl ether)의 tactility를 탄소 핵자기 공명을 이용하여 분석하였으며, 그 분석결과를 BF3OEt2나 SbCl5가 사용된 리빙 중합이 아닌 중합계에서 얻어진 고분자의 분석결과와 비교하였다. HI/I2 촉매에 의하여 얻어진 polymer의 sequence distribution은 Bernoullian 통계를 따르지 않았고 반면에 BF3OEt2를 사용하여 얻어진 것은 random statistics를 따르고 있었다. 중합온도가 감소할 때. 얻어진 고분자의 isotacticity는 증가하였고 random statistics로부터의 deviation은 증가하였다.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1992; 16(1): 29-35

    Published online Jan 25, 1992