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以长玻璃纤维(LGF)/聚对苯二甲酸丁二醇酯(PBT)复合材料为基体,加入膨胀性阻燃剂(IFR),研究了不同含量的IFR对LGF/PBT复合材料的燃烧性能、结晶性能及流变性能的影响。通过垂直燃烧(UL 94)和极限氧指数(LOI)测试得出,在IFR的含量为10%时,LGF/PBT/IFR复合材料通过UL94V-0级且LOI为28.2%;通过差示扫描量热仪、平板流变仪和傅里叶红外光谱分析得出,IFR与基体在熔融挤出后部分发生化学反应,引入极性基团,致使基体分子链运动困难,从而表现出复合材料的结晶度下降,储存模量增大,复合黏度增大,最终影响到复合材料的力学性能。
The intumescent flame retardant (IFR) was added to the LGF / PBT composites to study the flame retardancy of different content of IFR on LGF / PBT composites , Crystallization and rheological properties of the impact. The vertical burning (UL 94) and limiting oxygen index (LOI) tests showed that the LGF / PBT / IFR composites passed UL94V-0 and the LOI was 28.2% at the IFR content of 10% Thermal analysis, plate rheometer and Fourier transform infrared spectroscopy analysis showed that the IFR reacted with the matrix partly after melt extrusion and introduced polar groups, which made the molecular chain of the matrix difficult to move and thus showed the crystallization of the composite Degree decreases, the storage modulus increases, the composite viscosity increases, ultimately affecting the mechanical properties of composites.