纳米橡胶改性环氧树脂的制备及性能研究

Study on the Preparation and Properties of Epoxy Resin Modified with Nano-Rubber

摘要

将全硫化纳米羧基丁腈橡胶乳液（VP501）与环氧树脂E51按一定比例混合，然后减压蒸馏出乳液中的水分，可制备得到纳米羧基丁腈橡胶增韧改性环氧树脂。对VP501进行了粒径分布和红外光谱测试，同时对改性环氧树脂复合材料的工艺性能、热性能和力学性能等进行了研究。结果表明：高交联的橡胶乳液可以通过减压蒸馏的方法均匀分散于环氧树脂中。VP501改性环氧树脂复合材料流动性良好，符合自动压力凝胶（APG）生产工艺需求。固化物的冲击强度随着VP501添加量的增加而增大。当添加量为9份时，冲击强度从15.48kJ/cm²提高提升至20.92kJ/cm²。玻璃化转变温度同时也有提升，从113.43℃提升到115.75℃。

Abstract

Fully vulcanized nano-carboxylated nitrile rubber latex (VP501) was blended with epoxy resin E51 at specific ratios, followed by removal of water through vacuum distillation to prepare nano-carboxylated nitrile rubber-toughened epoxy resin. The particle size distribution and FTIR spectrum of VP501 were characterized, while the processability, thermal properties, and mechanical performance of the modified epoxy composites were investigated. Results demonstrate that the highly cross-linked rubber latex can be uniformly dispersed in epoxy resin via vacuum distillation. The VP501-modified epoxy composites exhibit excellent flowability, meeting the processing requirements for Automated Pressure Gelation (APG) technology. The impact strength of cured specimens increases with higher VP501 content. At 9 phr loading, the impact strength improves from 15.48 kJ/m² to 20.92 kJ/m². The glass transition temperature (Tg) also shows enhancement, rising from 113.43°C to 115.75°C

关键词

环氧树脂 / 全硫化纳米羧基丁腈橡胶（VP501） / 共混蒸发改性 / 增韧 / 玻璃转变温度

Key words

epoxy resin / full vulcanized nano-carboxylatednitrile rubber (VP501) / Blending-evaporation modification / toughening / glass transition temperature

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