석유계 피치가 첨가된 고온 탄소복합재용 페놀수지의 열 유변학적 거동 연구
Thermo-rheological behaviors of Phenolic Resins Blended with Petroleum-based Pitches for High Temperature Carbon Composites
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초록
본 연구에서는 각각에 다른 연화점을 갖는 석유계 피치의 열 유변학적 특성을 연구하였으며, 이를 함침용 페놀수지에 석유계 피치를 첨가하여 B-stage 형태의 페놀수지/석유계 피치 혼합물을 제조하였다. 그 결과, 연화점이 다른 석유계 피치는 QI의 함량이 증가할수록 피치의 유동성이 감소하였고, 고체의 점탄성 특성을 나타내었다. 또한, 다른 연화점을 갖는 석유계 피치를 페놀수지에 첨가함으로써, 페놀수지의 경화거동과 열 유변학적 특성에 미치는 영향에 대해 고찰하였을 때, 다른 연화점의 석유계 피치를 첨가함에 따라 페놀수지의 경화속도 및 경화거동을 조절할 수 있었으며, 이 중 P-Pitch 2가 첨가된 페놀수지 혼합물의 경우 동일한 경화 온도조건에서 다른혼합물에 비해 유동성이 높은 것을 확인할 수 있었다.
Abstract
In this study, the thermo-rheological behaivors of petroleum pitches with different softening points were studied, and a B-stage phenolic resins/petroleum pitches blends were prepared by adding petroleum pitches to the phenolic resins. As a result, the petroleum pitch with different softening points decreased the fluidity of the petroleum pitch as the Quinoline insoluble (QI) content increased and showed the viscous properties of the solid. In addition, the effect of adding petroleum pitches having different softening points on the thermo-rheological properties of phenolic resins was investigated. When petroleum pitch with a high softening point was added, the fluidity of the phenolic resin was reduced, and the hardening behavior was fast. It was possible to control the curing rate and curing behavior of the phenolic resin by adding petroleum pitches of different softening points. Among them, the phenolic resin mixture to which P-Pitch 2 was added has a higher fluidity than other blends under the same curing temperature condition.
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