通过同步氢化/热缩聚反应,制得中间相沥青（MP）;重点研究了四氢萘（THN）用量对MP性质的影响。研究表明THN增加,MP的软化点（SP）随之降低,H/C随之提高,不溶分随之减少;偏振光显微镜研究表明THN用量少于8%时,MP的形貌为分布不均的各向异性与各向同性两种沥青的混合物;而随着THN的增加,各向异性沥青逐渐趋于以中间相小球形态,并且较为均匀地分布到各向同性沥青基质之中。MP经保温处理后,纺丝性能得到改善,最终制得横截面呈无规结构的沥青基碳纤维。
In this work,the mesophase pitch was prepared through simultaneous hydrogenation-thermal condensation of coal tar pitch in tetralin.The influences of the content of tetralin on the properties of mesophase pitch were systematically investigated.Results showed that the softening point and insoluble content of mesophase pitch were decreased while H/C was increased gradually with the increase the content of tetralin;polarized light microscopy showed that the mesophase pitch was an uneven-distribution mixture of isotropic pitch and anisotropic pitch when the content of tetralin was less than 8%.With the increase the content of tetralin,the mesophase spheres became evenly distributed in isotropic matrix and the spinning ability of this mesophase pitch had been improved after further heat treatment.The ultimate carbon fiber from the mesophase had a cross-section of random-type.
参考文献
| [1] | M. G. DOBB;H. GUO;D. J. JOHNSON;C. R. PARK .STRUCTURE-COMPRESSIONAL PROPERTY RELATIONS IN CARBON FIBRES[J].Carbon: An International Journal Sponsored by the American Carbon Society,1995(11):1553-1559. |
| [2] | 刘银全,刘忠芝.针入法沥青软化点和可纺性的简易测定[J].新型碳材料,1994(03):30-31. |
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