玻纤对阻燃聚甲醛复合材料阻燃性能、力学性能及流变行为的影响研究

发布时间：2018-06-12 12:27

本文选题：玻璃纤维 + 聚甲醛　；参考：《塑料工业》2017年10期

【摘要】：采用熔融共混法制备了膨胀型阻燃剂(IFR)和玻纤(GF)增强改性的聚甲醛复合材料,利用垂直燃烧测试、极限氧指数测试、简支梁摆锤冲击试验机及万能力学测试仪考察了阻燃聚甲醛体系的阻燃性能及力学性能,并采用旋转流变仪测定了复合材料的流变性能。结果表明,质量分数为20%GF的加入使聚甲醛(POM)/IFR复合体系的拉伸强度提升15.8%,弯曲强度提升16.0%,冲击性能提升1倍。与未添加GF的复合体系相比,POM/IFR/GF复合材料表现出更高的动态模量和复数黏度。由于GF"烛芯效应"的作用,GF的加入未实现UL94阻燃等级。通过酚醛树脂对GF进行表面改性(m GF)后,POM/IFR/GF复合体系的极限氧指数(LOI)由22.7%提升至34.6%,力学性能略有提升,体系的模量、复数黏度均低于未改性GF增强体系。
[Abstract]:The expanded flame retardant (IFR) and glass fiber (GF) reinforced POM composites were prepared by melt blending. The resistance and mechanical properties of the flame retardant POM system were investigated by the vertical combustion test, the limit oxygen index test, the simple supported beam swing hammer impact tester and the universal mechanical test instrument. The results show that the tensile strength of the POM (POM) /IFR composite system is increased by 15.8%, the flexural strength is raised by 16%, and the impact property is raised by 1 times. The POM/IFR/GF composites exhibit higher dynamic modulus and complex viscosity compared with those without GF. Because of the "GF" candles effect, the POM/IFR/GF composite has a higher tensile strength. "The effect of" GF addition does not realize the flame retardant grade of UL94. After the surface modification of GF by phenolic resin (m GF), the limit oxygen index (LOI) of the POM/IFR/GF composite system is raised from 22.7% to 34.6%, and the mechanical properties are slightly improved. The modulus of the system and the complex viscosity of the system are all lower than that of the unmodified GF enhancement system.
【作者单位】：河南大学化学化工学院;
【基金】：河南省自然科学基金资助项目(162300410018) 河南省高等学校重点科研项目(16A150003,15A150041) 国家自然科学基金资助项目(51403051)
【分类号】：TB332

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