Di Matteo Pietro, Iadarola Andrea, Ciardiello Raffaele, Paolino Davide Salvatore, Gazza Francesco, Lambertini Vito Guido, Brunella Valentina
Department of Chemistry, Università di Torino, Via Pietro Giuria 7, 10125 Turin, Italy.
Department of Mechanical and Aerospace Engineering, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10039 Turin, Italy.
Polymers (Basel). 2024 Sep 2;16(17):2499. doi: 10.3390/polym16172499.
The cure kinetics of various epoxy resin mixtures, comprising a bisphenol epoxy, two epoxy modifiers, and two hardening agents derived from cardanol technology, were investigated through differential scanning calorimetry (DSC). The development of these mixtures aimed to achieve epoxy materials with a substantial bio-content up to 50% for potential automotive applications, aligning with the 2019 European Regulation on climate neutrality and CO emission. The Friedman isoconversional method was employed to determine key kinetic parameters, such as activation energy and pre-exponential factor, providing insights into the cross-linking process and the Kamal-Sourour model was used to describe and predict the kinetics of the chemical reactions. This empirical approach was implemented to forecast the curing process for the specific oven curing cycle utilised. Additionally, tensile tests revealed promising results showcasing materials' viability against conventional counterparts. Overall, this investigation offers a comprehensive understanding of the cure kinetics, mechanical behaviour, and thermal properties of the novel epoxy-novolac blends, contributing to the development of high-performance materials for sustainable automotive applications.
通过差示扫描量热法（DSC）研究了各种环氧树脂混合物的固化动力学，这些混合物包含一种双酚环氧树脂、两种环氧改性剂以及两种源自腰果酚技术的硬化剂。这些混合物的研发旨在获得生物含量高达50%的环氧材料，用于潜在的汽车应用，符合2019年欧洲关于气候中和及二氧化碳排放的法规。采用弗里德曼等转化率方法确定关键动力学参数，如活化能和指前因子，以深入了解交联过程，并使用卡马尔 - 苏鲁尔模型描述和预测化学反应动力学。采用这种经验方法来预测特定烘箱固化周期的固化过程。此外，拉伸试验显示出令人鼓舞的结果，表明这些材料相对于传统同类材料具有可行性。总体而言，这项研究全面了解了新型环氧 - 酚醛清漆共混物的固化动力学、力学行为和热性能，有助于开发用于可持续汽车应用的高性能材料。
