With the consideration of all the reactions involved in the polyesterification of BHET ( bis-β-hydroxyethyl terepliathalate) such as the primary forward polycondensation reaction, its reverse reaction and the cracking reaction, a kinetic equation was derived.
考虑了对苯二甲酸乙二酯(BHET)缩聚过程的主反应、逆反应及热裂解反应,得到一个动力学方程式。
The PBO polymer solution was synthesized by means of polycondensation of 4,6-diaminoresorcinol ( DAR) and terephthalic acid ( TPA). At 180~ 200 ℃, the polymer starts to form liquid crystal state, and the fiber can be synthesized by using the dry-jet wet-spinning method.
采用4,6-二氨基间苯二酚(DAR)与对苯二甲酸(TPA)缩聚的方法制备PBO聚合物溶液,在180~200℃使聚合物形成液晶态,利用干喷湿纺制法制备纤维。
The short axle bearing of final polycondensation reactor was damaged, the bolt was breaken, the inner wall was scratched.
终缩聚反应器短轴轴承损坏,螺栓断裂,划伤内壁。
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