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分别采用POE和POE-g-(GMA-co-St)对PBT进行增韧,制备了PBT/POE和PBT/POE-g-(GMA-co-St)体系。研究了POE和POE-g-(GMA-co-St)对改性PBT力学性能的影响,并利用TEM对其相结构进行了表征。结果表明:与POE相比,POE-g-(GMA-co-St)对PBT的增韧效果明显。当POE-g-(GMA-co-St)用量为15份时,改性PBT的缺口冲击强度为29.21kJ/m2,分别是纯PBT和PBT/POE体系的约4倍和3倍,且拉伸强度和弯曲强度下降幅度较小。POE-g-(GMA-co-St)在PBT基体中分散尺寸小且分布均匀,两者具有良好的相容性。
PBT / POE and PBT / POE-g- (GMA-co-St) systems were prepared by toughening PBT with POE and POE-g- (GMA- The effects of POE and POE-g- (GMA-co-St) on the mechanical properties of modified PBT were investigated. The phase structure of the modified PBT was characterized by TEM. The results show that the toughening effect of POE-g- (GMA-co-St) on PBT is obvious compared with POE. When the amount of POE-g- (GMA-co-St) was 15 parts, the notched impact strength of modified PBT was 29.21kJ / m2, which was about 4 times and 3 times that of pure PBT and PBT / POE systems respectively Tensile strength and bending strength decreased less. POE-g- (GMA-co-St) dispersed in the PBT matrix is small in size and uniform in distribution, both of which have good compatibility.