丙烯酸接枝相容剂用于玻纤增强PET复合材料的性能研究

Study on Properties of Glass Fiber Modified PET Using Acrylic Acid Graft Compatibilizer

通过向聚对苯二甲酸乙二醇酯(PET)和玻璃纤维(短)的混合体系中加入一定量的丙烯酸接枝相容剂,经过双螺杆造粒得到玻纤增强PET复合材料,经测试表明:随着相容剂含量的增加,玻纤增强PET复合材料的玻璃化转变温度、冷结晶温度和熔融温度均逐渐降低,拉伸强度逐渐降低,断裂伸长率逐渐升高但远低于纯PET材料;冲击强度随着相容剂含量增加而增加,复合材料硬度随相容剂含量增加而降低,但均高于纯PET材料。在应用过程中,应根据实际情况选择合适的相容剂添加比例,调节复合材料性能,满足特定场合使用要求。

Through adding the Acrylic graft compatibilizer into the system of polyethylene terephthalate(PET)and glass fiber(short),the composite was obtained by twin-screw extruder.Test shows:With the increase of compatibilizer,the Tg,Tc and Tm of composites are gradually reduced,the tensile strength is reduced too.The elongation at break is gradually increased but much lower than pure in PET materials,the impact strength is increased with the increase of compatibilizer,and the hardness is decreased.But all of them are better than the properties of pure PET materials.In practical applications,the appropriate proportion of compatibilizer should be selected according to the actual situation,thus properties of composite materials could be assured to meet the requirements of specific occasions.