The Effect of Foaming Agents on the Structure and Properties of Epoxy Resin

IF 2.7 3区化学 Q2 POLYMER SCIENCE

Journal of Applied Polymer Science Pub Date : 2025-03-18 DOI:10.1002/app.56988

Jingkang Wang, Dongzhi Wang, Zhiqiang Yao, Kaiyang Han, Qi Li, Anqi Xia

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Abstract

Compared to solid polymers, polymer foams are widely used in civil and industrial applications, including packaging, sports equipment, absorbents, and automotive components. This is due to their superior properties, such as low weight, high strength-to-weight ratio, excellent insulation, thermal stability, impact resistance, toughness, and long fatigue life. This study presents a novel approach to incorporating dimethylhydrogensiloxane into epoxy resin for the fabrication of polymer foams, while systematically investigating the impact of foaming agent addition on the properties of the foams. The experimental results show that the foaming agent induces a reaction between the SiH bonds in the agent and the NH bonds in the curing agent, releasing hydrogen gas within the polymer. This reaction also forms stable SiN bonds in the polymer matrix, significantly improving the thermal stability of the epoxy resin foam. Furthermore, the study examines how varying foaming agent concentrations influence the foam's properties. Specifically, at a foaming agent concentration of 3 wt%, the foam exhibits the highest specific compressive strength of 7.9 MPa/cm².

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发泡剂对环氧树脂结构和性能的影响

与固体聚合物相比，聚合物泡沫广泛应用于民用和工业领域，包括包装、运动器材、吸收剂和汽车零部件。这是由于其优越的性能，如低重量，高强度重量比，优异的绝缘性，热稳定性，抗冲击性，韧性和长疲劳寿命。本研究提出了一种将二甲基氢硅氧烷加入环氧树脂中制备聚合物泡沫的新方法，并系统地研究了发泡剂添加量对泡沫性能的影响。实验结果表明，发泡剂诱导了发泡剂中的Si - H键与固化剂中的N - H键之间的反应，释放出聚合物内的氢气。该反应还在聚合物基体中形成稳定的Si - N键，显著提高环氧树脂泡沫的热稳定性。此外，研究考察了不同发泡剂浓度对泡沫性能的影响。具体来说，发泡剂浓度为3 wt%时，泡沫的最高比抗压强度为7.9 MPa/cm2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Polymer Science 化学-高分子科学

CiteScore

5.70

自引率

10.00%

发文量

1280

审稿时长

2.7 months

期刊介绍： The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.