高性能增韧阻燃型环氧树脂的制备

Preparation of Toughened and Flame-Retardant Epoxy Resin with High Performance

通过力学性能测定、热失重、原子力显微镜、极限氧指数等方法研究了以平均粒径为100nm的丁苯吡弹性纳米粒子为增韧剂,2,4,6-三溴苯胺(TBA)为阻燃剂,三氧化二锑为阻燃协效剂的改性环氧树脂的性能。结果表明在一定范围内,纳米丁吡可在环氧树脂中达到纳米级分散,能明显增韧环氧树脂,同时还可提高其耐热性;而TBA有较好的阻燃效果,其与Sb2O3配用时具有协同阻燃效应。将各种改性剂按一定的比例加入到环氧树脂中,可以得到冲击强度、热变形温度以及氧指数都有大幅度提升的高性能的增韧阻燃型环氧树脂。

The Vinylpyridine-Styrene-Butadine elastomeric nano-particles （VSBENP） with average particle size of only 100nm ,2,4,6-tribromoaniline （TBA） and Sb2O3 were used as toughening agent, flame retardant and flame-retardation synergist, respectively, for modifying epoxy resin. The mechanical, thermal properties and flame retardancy of modified epoxy networks were measured by impact tests,Shore hardness tests,TGs and limiting oxygen index （LOI）, respectively. The micro-structures were detected by AFM. The experimental results exhibited that epoxy matrix with a low volume fraction of VSBENP （less than 25phr） could lead to substantial enhancements of the toughness and thermostability for the reasons that VSBENP were distributed in it homogeneously. And the epoxy resin system containing TBA had better flame retardancy and TBA displayed the flame-retardation synergism when it was used together with Sb2O3. The modified epoxy including 15phrVSBENP,20phrTBA and 9phr Sb2O3 had the best comprehensive properties.