摘要
八氨苯基低聚硅倍半氧烷(OAPS)用于改性环氧树脂,以提高固化树脂的玻璃化转变温度(Tg)、力学性能和阻燃性。用差示扫描量热法(DSC)研究了固化动力学,结果表明,OAPS具有与固化剂异佛尔酮二胺相似的固化行为。DSC和傅里叶变换红外光谱测试表明,OAPS通过化学键交联到了网络结构中,从而改善环氧树脂复合材料的性能。通过对复合材料的力学性能分析发现,其拉伸强度提升了104%。动态力学热分析表明,复合材料的Tg提高。热重分析显示,OAPS提升了复合材料的热稳定性。锥形量热分析表明,复合材料的热释放速率峰值下降,点火时间明显延长。垂直燃烧(UL-94)测试证明,熔融滴落现象显著改善。因此,OAPS能够改善环氧树脂的力学性能、热稳定性和阻燃性。
Octa(aminophenyl)silsesquioxane(OAPS)was applied to epoxy resin to increase the glass transition temperature(Tg),mechanical properties and flame retardancy of the cured resin.Differential scanning calorimetry(DSC)was employed to investigate the curing kinetics,and the results show that the OAPS possesses the similar curing behavior to the hardener isophorondiamine.Furthermore,the results of DSC and FT-IR indicate that OAPS was crosslinked into the network structure via chemical bonds,thereby the properties of epoxy resin composites are improved.Results of a universal testing machine reveal that the tensile strength of the composite is increased by 104%.Dynamic thermomechanical analysis suggests that the Tg is increased;thermogravimetric analysis reveals that OAPS can improve the thermal stability of the composites.Cone calorimetry analysis shows that the peak of the heat release rate is decreased and the time to ignition is obviously prolonged.A vertical burning(UL-94)test shows that the melt dripping phenomenon is significantly improved.Therefore,OAPS can improve the mechanical properties,thermal stability and flame retardancy of epoxy resins.
作者
刘磊春
吴义维
张文超
杨荣杰
Leichun Liu;Yiwei Wu;Wenchao Zhang;Rongjie Yang(National Engineering Technology Research Center of Flame Retardant Material,School of Materials,Beijing Institute of Technology,Beijing 100081,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第3期50-58,共9页
Polymer Materials Science & Engineering
基金
国家重点科研项目(2016YFB0302101)。
