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以季戊四醇和己二酸合成了具有活性端羧基的 A2 -B4型超支化聚酯 ,并进一步研究了该 A2 -B4型超支化聚酯活性端羧基与环氧氯丙烷的反应。讨论了浓度、温度以及搅拌速率对其反应动力学的影响。结果表明 ,该反应的动力学方程偏离了经典的一级方程。我们利用反常扩散控制理论对此结果进行了相应的微观解释 ,并给出了描述这一反应体系的唯象动力学方程。
The A2B4 hyperbranched polyester with active carboxyl end groups was synthesized from pentaerythritol and adipic acid. The reaction between the carboxyl end groups and the epichlorohydrin of the A2B4 hyperbranched polyester was further studied. The effects of concentration, temperature and stirring rate on the reaction kinetics were discussed. The results show that the kinetic equation of the reaction deviates from the classical first-order equation. We use the theory of anomalous diffusion control to make a corresponding micro-interpretation of the result and give the phenomenological kinetic equation describing the reaction system.