A Semi-Empirical Equation for the Kinetics of Polyesterification

潘强余; 张常群; 何仁文

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A Semi-Empirical Equation for the Kinetics of Polyesterification

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- A Semi-Empirical Equation for the Kinetics of Polyesterification
- CIESC Journal Issue 1, (1980)
- 作者机构：
  
  北京化工学院,北京化工学院,北京化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 March 1980，
  
  Published：25 March 1980
- 稿件说明：
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潘强余, 张常群, 何仁文. A Semi-Empirical Equation for the Kinetics of Polyesterification[J]. CIESC Journal, 1980, (1).
DOI：

潘强余, 张常群, 何仁文. A Semi-Empirical Equation for the Kinetics of Polyesterification[J]. CIESC Journal, 1980, (1). DOI：

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。

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

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:

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