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Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.34, No.1, 70-76, 1996
Ziegler-Natta와 Metathesis 촉매에 의한 측쇄형 액정폴리아세틸렌 유도체의 합성
Synthesis of Side-Chain Liquid Crystalline Polyacetylene Derivatives by Ziegler-Natta and Metathesis Catalysts
오세용, Akagi K, Shirakawa H
1-[p-(trans-4’-alkylcyclohexyl)phenoxy]alkyne, 5-p-pentylbiphenoxy-1-pentyne과 같은 액정 moiety를 갖는 새로운 치환아세틸렌을 합성하여, Ziegler-Natta와 metathesis 촉매로 중합하였다. GPC, IR, NMR, UV-Visible 분광학 장치를 사용하여 고분자의 분자량 및 구조를 조사하였다. 특히 Ziegler-Natta 촉매인 Fe(acac)3-AlEt3은 중량평균분자량이 2-3×106의 고분자량과 입체규칙성이 뛰어난 cis형 구조의 고분자를 생성하였다. 모든 고분자는 벤젠, 클로로포름, THF와 같은 유기용매에 용해되었다.
We have synthesized novel mono-substituted acetylenes with a liquid crystalline moiety such as 1-[p-(trans-4’-alkylcyclohexyl)phenoxy]alkynes and 5-p-pentylbiphenoxy-1-pentyne and then polymerized them with Zieg-ler-Natta and metathesis catalysts. Molecular weights and structure of these polymers were investigated by using GPC, IR, NMR and UV-visible spectroscopic measurements. Especially, Ziegler-Natta catalyst[Fe(acac)3-AlEt3] pro-duced an extremely high molecular weight polymer of Mw=2-3×106 and cis form polymer with a high stereoregularity. All polymers were soluble in organic solvents such as benzene, chloroform and THF.
Keywords: Mono-substituted Polyacetylene; Ziegler-Natta Catalyst; Metathesis Catalyst; Liquid Crystalline; Solubility; Polymer Structure
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[Cited By]
  1. Oh SY, Hong SM, Oh SI, Polymer(Korea), 21(6), 937, 1997
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