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헥산 가용성분을 제거한 석탄 타르 핏치로부터 메조페이스 핏치의 형성
Mesophase Pitch from Hexane-insoluble Coal Tar Pitch
HWAHAK KONGHAK, October 1989, 27(5), 712-718(7), NONE
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Abstract
석탄 타르 핏치에서 헥산 가용성분을 제거한 후 410-450℃에서 열처리하면서 생성시킨 메조페이스 핏치의 광학적 이방성과 용해도를 조사하였다. 메조페이스의 생성은 같은 온도에서는 헥산 가용성분을 포함한 시료보다 느렸으나 생성된 메조페이스는 합체가 잘 되어 450℃에서 7시간 처리한 경우는 C/H 몰비가 2.33이었고, 배향성이 있는 bulk 메조페이스가 되었다. 한편 열처리시간이 증가하여 bulk 메조페이스가 되어도 벤젠 불용성분/피리딘 가용성분과 피리딘 불용성분/퀴놀린 가용성분의 합한 양은 크게 변화되지 않고 퀴놀린 불용성분은 주로 벤젠 가용성분이 탈수소축합하여 생성되었다.
Hexane-insoluble coal tar pitch was converted into mesophase pitch by heat treatment in the range of 410-450℃, and its optical anisotropy and solubility were investigated to see the formation of mesophase. The C/H ratio was about 2.33 and the optical texture was classified as a mixture of small domain(SD) and flow(F) when the pitch was heat treated at 450℃, 7hrs. Quinoline insolubles of mesophase pitch was mainly from benzene solubles, and the sum of benzene insolu-bles/pyridine solubles and pyridine insolubles/quinoline solubles was maintained almost constant during the heat treatment of the pitch.