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Ziegler - Natta 와 Metathesis 촉매에 의한 측쇄형 액정폴리아세틸렌 유도체의 합성
Synthesis of Side - Chain Liquid Crystalline Polyacetylene Derivatives by Ziegler - Natta and Metathesis Catalysts
오세용 , Kazuo Akagi , Hideki Shirakawa ( Se Young Oh , Kazuo Akagi , Hideki Shirakawa )
UCI I410-ECN-0102-2008-570-001775374

1-[p-(trans-4`-alkylcyclohexyl)phenoxy]alkyne, 5-p-pentylbiphenoxy-1-pentyne과 같은 액 정 moiety를 갖는 새로운 치환아세틸렌을 합성하여, Ziegler-Natta와 metathesis 촉매로 중합하였다. GPC, IR, NMR, UV-Visible 분광학 장치를 사용하여 고분자의 분자향 및 구조를 조사하였다. 특히 Ziegler-Natta 촉매인 Fe(acac)₃-AlEt₃은 중량평균분자량이 2-3×10^6의 고분자량과 입체규칙성이 뛰어난 cis 형 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(traps-4`-alkylcyclohexyl)phenoxy]alkynes and 5-p-pentylbiphenoxy-l-pentyne and then polymerized them with Ziegler-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] produced an extremely high molecular weight polymer of M_w=2-3×10^6 and cis form polymer with a high stereoregularity. All polymers were soluble in organic solvents such as benzene, chloroform and THF.

[자료제공 : 네이버학술정보]
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