摘要
针对环氧树脂固化后质脆,不适应低温环境的缺点,探索了一种使用淀粉对环氧树脂进行改性的方法,取得了良好的效果,将淀粉引入环氧树脂体系,用聚乙二醇-400作为混溶剂,大幅度降低了环氧树脂体系的毒性和改性成本。用电子万能实验机表征材料的力学性能,分别测试了材料在常温和低温-70℃下的力学性能。用差示扫描量热仪测试了材料的玻璃化转变温度,用热重分析仪表征材料的热稳定性。结果表明,在改性剂含量为15%(质量分数)的时候,材料的低温拉伸强度提高了312.42%,低温弯曲强度提高了279.43%,其玻璃化转变温度降低了40.33%,而材料的热稳定性只有略微的降低。实现了在不以热稳定为代价的前提下,对力学性能大幅提高的目的。
In allusion to the cured epoxy resin glue＇s shortage such as crisp, fissile and can＇t be used in the low temperature surroundings, this paper used starch as the modifier to modified epoxy resin, obtained a good result. Imported starch to the epoxy rasin, polyethylene glycol was used as miscible solvent, reduced the system＇s toxicity and the modify cost. Electronic universal testing machine was used to tested the material＇s mechanical properties at room temperature and temperature at-70℃, respectively. Differential scanning calorimeter（ DSC） was used to tested the material＇s glass transition temperature（ Tg）. ultraviolet and visible spectrophotometer was used to tested the sample＇s ultraviolet light transmittance. Thermogravimetric Analyzer（TGA）was used to characterized the material＇s thermostability. The results show that starch can improve epoxy resin material＇s toughness and cryogenic property effectively. The epoxy resin material＇s cryogenic property get the biggest improvement when the modifier＇s percentage composition is 15%wt. The material＇s Tg has become lower and tensile strength in low temperature has improve 312.42%, flexural strength in low temperature has improve 279.43%. Achieved the purpose that on the premise of not at the expense of the thermal stability, to improve the mechanical properties prominently.
作者
白健康
雷永林
霍冀川
BAI Jiankang LEI Yonglin HUO Jichuan(Biomass materials engineering research center of the ministry of education, Southwest University of Science and Technology, mianyang, 621010 College of materials science and engineering, Southwest University of Science and Technology, mianyang, 621010 Center of analysis and measurement, Southwest University of Science and Technology, mianyang, 621010)
出处
《玻璃》
2017年第1期8-14,共7页
Glass
关键词
增韧
低温
淀粉
环氧树脂
改性
Toughen
Low temperature
Starch
Epoxy resin
Modified
