CAJ | 학술논문

以纯化的煤焦油沥青为原料,考察了热聚合温度和恒温时间对中间相沥青的收率、光学显微形态、软化点和族组成的影响.结果表明:反应温度在420℃,恒温5 h时得到了软化点为312℃的流线体型中间相沥青,其收率为79.1%;热聚合反应在相对较低的温度400℃,反应时间为10 h时形成了软化点为305℃、收率为81.4%的优质广域型可纺性中间相沥青.对该原料煤沥青而言,通过控制热聚合反应温度和恒温时间可以达到制备优质中间相的目的.
이순화적매초유력청위원료,고찰료열취합온도화항온시간대중간상력청적수솔、광학현미형태、연화점화족조성적영향.결과표명:반응온도재420℃,항온5 h시득도료연화점위312℃적류선체형중간상력청,기수솔위79.1%;열취합반응재상대교저적온도400℃,반응시간위10 h시형성료연화점위305℃、수솔위81.4%적우질엄역형가방성중간상력청.대해원료매력청이언,통과공제열취합반응온도화항온시간가이체도제비우질중간상적목적.
Mesophase pitch with high anisotropic content and low softening point was prepared from a purified coal tar pitch. The effects of condensation temperature and soaking time on the yield, anisotropic texture and softening point of derived mesophase pitches were investigated. The long-flow mesophase pitch with the softening point of 312 ℃ and yield of 79. 1% was obtained at the condensation temperature of 420 ℃ for 5 h. By heat - treatment at 400 ℃ for 10 h the prepared mesophase pitch containing large domain texture possesses the lower softening point (305 ℃) and high yield (81.4%). The results indicate that low temperature and long soaking time are beneficial to the formation of mesophase pitch with high yield, excellent anisotropic texture and low softening point.