Article
  • Spontaneous Polymerization of 3,4,5,6-Tetrahydrophthalic Anhydride by 2-Methyl Imidazole
  • Park IH, Jung JC
  • 2-Methyl Imidazole에 의한 3,4,5,6-Tetrahydrophthalic Anhydride의 중합반응
  • 박인환, 정진철
Abstract
3, 4, 5, 6-Tetrahydrophthalic anhydride (THPA) was spontaneously polymerized and decarboxylyated by 2-methyl imidazole (MI). The polymerization was found to occur through formation of a charge-transfer complex (CTC) detected by UV spectrophotometer, although its exact role in the mechanism is uncertain. The formation of CTC was observed to decrease with increasing the yield of polymerization. The structure of the polymer was examined by IR spectroscopy and the result showed to disappear an anhydride peak of 1840cm-1 caused by THPA component. In relation to this polymerization, the formation of the polymer. its molecular weight and the content of carbon dioxide evolved in the polymerization increased with increasing the relative amount of THPA to MI and the polymerization temperature. By fractionating the polymer through gel filtration, polymers with various molecular weights which contain the group of MI were separated.

무수 3, 4, 5, 6-테트라하이드로프탈산(THPA)은 2-메틸이미다졸(MI)에 의해 자발적으로 중합이 되며 반응시 이산화탄소 가스가 유리되어 나왔다. 중합체 형성 반응의 기구를 확실히 알 수는 없었지만 중합반응은 전하이동착물(CTC)을 경유하여 일어났다. 반응초기에 형성된 CTC는 중합체로의 수율이 증가할 수록 감소되어 소멸되었다. 적외선 분광분석에 의해 생성된 중합체의 정성적인 구조확인을 해 본 결과. THPA 성분에 기인되는 1840cm-1의 무수물 피이크가 소멸되어 있어 중합체 성분중 THPA에서 오는 무수물 구조가 개열이 되었다고 사료되었다. 중합체 형성 반응과 그 분자량 그리고 중합반응시 방출되는 이산화탄소 가스 량들은 MI에 대한 THPA의 비율 및 반응 온도가 높을 수록 증가되었다. 중합반응에서 얻어진 중합체들은 겔여과를 하여 분자량 별로 수거하였는데 모두 MI 성분이 포함되어 있었다.

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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

  • 1990; 14(4): 307-314

    Published online Aug 25, 1990