PA MXD6 的动态加热聚合研究:从热分析到高效聚合

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL
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引用次数: 0

摘要

要优化聚(间羟基己二胺)(PA MXD6)的实用聚合策略,需要调节高温停留时间并防止反应混合物凝固。动态加热策略有望解决这一问题。然而,由于反应物状态的持续变化,传统的缩聚动力学并不是表征非等温过程的最佳方法。本研究采用热分析作为连续监测方法,全面研究压力、温度和扩散对聚合的影响。结果表明,从整个反应过程中动力学参数的演变来看,高加热速率会导致更快的反应速率。然而,过高的加热速率会增加凝固风险。为了解决这一矛盾,我们开发了一种带压力的低速率加热工艺,以实现高效聚合并扩大规模,从而生产出优质产品。这项研究为聚酰胺聚合提供了新的见解,并为提高聚合效率和工艺稳定性提供了实用指南。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Study on the dynamic heating polymerization of PA MXD6: From thermal analysis to efficient polymerization

Study on the dynamic heating polymerization of PA MXD6: From thermal analysis to efficient polymerization

Optimizing a practical polymerization strategy for poly(m-xylylene adipamide) (PA MXD6) requires regulating the high-temperature residence time and preventing the solidification of the reaction mixture. Dynamic heating strategies have shown promise in addressing this issue. However, conventional polycondensation kinetics are not optimal for characterizing nonisothermal processes due to continuous changes in the reactant state. This study employed thermal analysis as a continuous monitoring method to comprehensively investigate the effects of pressure, temperature, and diffusion on polymerization. The results indicate that high heating rates lead to faster reaction rates, as evidenced by the evolution of the kinetic parameters throughout the reaction process. Nevertheless, excessively high heating rates increase the solidification risk. To resolve this contradiction, a low-rate heating process with pressure was developed for efficient polymerization and scale-up, resulting in superior products. This study provides new insights into polyamide polymerization and offers practical guidelines for enhancing polymerization efficiency and process stability.

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来源期刊
Thermochimica Acta
Thermochimica Acta 化学-分析化学
CiteScore
6.50
自引率
8.60%
发文量
210
审稿时长
40 days
期刊介绍: Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes
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