摘要:本论文主要研究了不同玻纤含量（30%、32%、34%、36%、38%）和不同增韧剂对聚对苯二甲酸丁二醇酯（PBT）改性影响。通过万能电子拉力机分别研究比较不同玻纤含量和不同增韧剂对PBT回料力学性能的影响。从玻纤含量对机械性能的影响角度来看，随着玻纤含量的增加，复合材料的抗张强度，弯曲强度和冲击强度逐渐提高。这是因为玻纤本身有很好的机械性能，经有机偶联剂包覆后其极性与PBT基体树脂相近，使得玻纤与PBT的界面性能更好，因而经有机化处理后PBT/GF复合材料的机械性能会有所提高。从增韧剂种类对机械性能的影响角度来看，在玻纤含量相同的情况，各种增韧剂加入量相同时，PC对复合材料机械性能提高的效果更好。上述结果表明玻纤增强聚对苯二甲酸丁二醇酯复合材料的最佳机械性能可以通过改变玻纤含量和增韧剂种类以及增韧剂的含量得到。

关键词：聚对苯二甲酸丁二醇酯；玻璃纤维；复合材料；改性；机械性能；增韧剂

Abstract：This paper mainly studies the modified effect of the different glass fiber content （30%、32%、34%、36%、38%） and different flexibilizers on polybutylene terephthalate（PBT）. Through the universal electronic tensile machine we respectively studied and compared the effect of different glass fiber content and different flexibilizers on PBT / GF composites mechanical properties. From the effect of different glass fiber content on the mechanical properties of PBT / GF composites, we found, with the glass fiber content increasing, the mechanical properties of properties of the composites improved gradually. This was because glass fiber itself had good mechanical properties, and its polarity coated by the organic coupling agent was similar with PBT matrix resin, making the interface of glass fiber and PBT better performance, the mechanical properties of PBT / GF composites after organic treatment would be improved. From the effect of different kinds of flexibilizers on the mechanical properties of PBT / GF composites, with the same content of glass fiber, comparing with other flexibilizers, PC made the best effect on the mechanical properties of composite materials. From the above results, it is suggested that the optimum mechanical properties of the fiber-reinforced polymer composite can be achieved by varying the content of glass fiber and the kinds of flexibilizers and the content of the flexibilizer. 

Key words: poly（butylene terephthalate）;glass fiber; polymer composite; modified ; mechanical property; flexibilizere water modification；photo initiator；Grafting degree；Water contact angle．