Exploring the curing kinetics of Acrolein-Pentaerythritol resin: Impact of molecular weight and molecular weight distribution on cure behavior

IF 3.1 2区化学 Q2 CHEMISTRY, ANALYTICAL

Thermochimica Acta Pub Date : 2024-08-15 DOI:10.1016/j.tca.2024.179851

Qian Yu, Qihui Zeng, Lichun Jiang, Jianjun Li, Fang Yang, Gang Li, Jie Chen, Chuande Zhao

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Abstract

Curing kinetics are crucial for designing and optimizing the process parameters of a resin. This study examines the non-isothermal curing kinetics of acrolein-pentaerythritol (APE) resins, focusing on the impact of molecular weight (MW) and molecular weight distribution (MWD) on their cure behavior. Kinetic parameters were determined using isoconversional and combined kinetic analysis methods through microcalorimeter measurements. The findings suggest that the cure process follows the nucleation and growth models (Avrami−Erofeev equation), with an activation energy of 72.2 kJ/mol. A comparison of two APE resins with different molecular weights and molecular weight distributions reveals that higher MW components expedite the initial curing reaction but impede the main curing process, leading to extended curing durations. This study provides valuable insights into the curing kinetics of APE resin and the influence of MW and MWD, contributing to the reliable and reproducible production of composite parts.

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探索丙烯醛-季戊四醇树脂的固化动力学：分子量和分子量分布对固化行为的影响

固化动力学对于设计和优化树脂的工艺参数至关重要。本研究探讨了丙烯醛-季戊四醇（APE）树脂的非等温固化动力学，重点研究了分子量（MW）和分子量分布（MWD）对其固化行为的影响。通过微量热计测量，采用等转换和组合动力学分析方法确定了动力学参数。研究结果表明，固化过程遵循成核和生长模型（Avrami-Erofeev 方程），活化能为 72.2 kJ/mol。对两种具有不同分子量和分子量分布的 APE 树脂进行比较后发现，较高分子量的成分可加速初始固化反应，但会阻碍主要固化过程，从而导致固化持续时间延长。这项研究为了解 APE 树脂的固化动力学以及分子量和分子量分布的影响提供了宝贵的见解，有助于可靠、可重复地生产复合材料部件。

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来源期刊

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