A study on cure kinetics and time-temperature-transformation cure diagram of epoxy/cyanate ester co-curing system

IF 4.1 2区化学 Q2 POLYMER SCIENCE Polymer Pub Date : 2025-03-04 DOI:10.1016/j.polymer.2025.128230

Yajing Qiao, An Xing, Chenchen Gao, Peichen Yuan, Zhiqi He, Jianyong Lv, Shuang Li, Pengfei Xue, Songnan Niu, Xiaoyu Li

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Abstract

Copolymerization of epoxy resin and cyanate ester combines the advantages of both epoxy thermosets and cyanate esters, taking important roles in the field of electronic packaging and aerospace applications. However, optimal cure control is essential to achieve outstanding performance, due to its complex reaction mechanism and step growth of network polymer. Although many groups investigated the cure behaviors of epoxy/cyanate ester co-curing system, those works are mainly focused on applying different models to obtain various curing kinetic parameters. Herein, in addition to obtaining curing kinetic parameters using Kissinger equation and Ozawa equation, diffusion factor was purposely introduced into Kamal model to successfully describe the whole cure process, including both kinetically controlled stage and diffusion controlled stage. Meanwhile, the applicability of DiBenedetto equation to T_g vs. conversion plots of epoxy/cyanate ester co-curing system was confirmed regardless of its complex reaction mechanism, and the one-to-one relationship between T_g and conversion of this co-curing system was observed. In addition, time-temperature-superposition kinetic was studied, and corresponding T_g∼lnt master curve was obtained. Moreover, time-temperature-transformation cure diagram, with vitrification curve and iso-conversion curves, was constructed for the first time in the case of epoxy/cyanate ester co-curing system.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.