【摘要】 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。再对不同类型和不同工况的工业反应器的实测数据进行综合分析,从而经验地确定了动力学方程式中不易测定的乙二醇（EG）浓度与搅拌速度、熔体的比表面等的关联式。最后得到了聚合度（DP）随工艺条件（温度T、压力p、反应肘间τ）及反应器的结构参数（搅拌速度R、反应体系的比表面ε）变化的半经验公式这个公式能够概括前人提出的一些公式,并能解释已经发表的许多实验曲线,可以定性和半定量地解决缩聚反应器设计中的问题。更多还原

【Abstract】 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. As the concentration of ethylene glycol (EG) appeared as a term in the derived equation is difficult to determine, it was empirically correlated with the speed of stirring, R, the specific surface of the reacting system, etc. Finally a semiempirical equation correlating the average degree of polyesterification ( DP )with both the operating parameters (such as the temperature T, pressure p and the time of residence ) and the constructional parameters of the industrial reactors(such as R and ε)has been obtained as follows:更多还原