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为了研制化学气相沉积法 Si C连续纤维用的大直径中间相沥青炭单丝 (炭芯 ) ,由 FCC油浆 3 0 0～ 4 0 0℃馏分调制了可纺中间相沥青。FCC油浆 3 0 0～ 4 0 0℃馏分形成中间相的特征反应 ,是芳环脱自由基缩合形成大平面分子结构的齐聚反应 ,而加压齐聚反应获得的呈粗纤维状大域融并结构、 1 0 0 %光学各向异性的可溶性中间相沥青 ,是制备大直径中间相沥青炭单丝的优质前驱体。详述了齐聚反应的机理及中间相形成过程的压力效应
In order to develop large-diameter mesophase pitch monolayer (carbon core) for Si C continuous fibers by chemical vapor deposition, a spin-dry mesophase pitch was prepared from 300 ~ 400 ℃ fraction of FCC slurry. The characteristic reaction of the FCC slurry at 3000 ~ 400 ℃, which forms the mesophase, is the oligomerization reaction of the aromatic ring deradiative condensation to form a large planar molecular structure. However, And structure, 100% optically anisotropic soluble mesophase pitch, is a good precursor for preparing large diameter mesophase pitch monofilament monofilaments. The mechanism of oligomerization reaction and the pressure effect during the formation of mesophase are described in detail