PPS/SEBS-g-MAH/PA46合金的制备及性能研究

Study on Preparation and Properties of PPS/SEBS-g-MAH/PA46 Alloy

通过合金化增韧改性PPS。在聚苯硫醚(PPS)中加入聚酰胺(PA46)和增容剂苯乙烯-乙烯-丁二烯-苯乙烯接枝马来酸酐(SEBS-g-MAH),通过熔融共混制备了PPS/SEBS-g-MAH/PA46合金;进一步使用二苯基甲烷二异氰酸酯(MDI)对PPS树脂进行活化处理,之后同样制备了活化PPS/SEBS-g-MAH/PA46合金。测试了合金的力学性能和热性能,并用扫描电镜观察了合金的微观结构形态。结果表明,加入增容剂后,合金的冲击强度有所提高;PPS树脂经过MDI活化后,合金的性能显著提高;当活化PPS/PA46质量比为70/30、SEBS-g-MAH质量分数为9%时,能制备出综合性能优良的合金材料,其冲击强度为8.4 kJ/m2,拉伸强度为61.2 MPa,弯曲强度为81.5 MPa,热变形温度为117℃。

PA46 was used in toughening modification of PPS. PPS/SEBS-g-MAH/PA46 alloy was first prepared by adding the compatibilizer SEBS-g-MAH and PA46 into PPS by melting blending. PPS resin was treated by MDI, and activated MPPS/SEBS-g-MAH/PA46 alloy was prepared. The mechanical property and thermal property of the alloy were tested. The micro-structure morphology of the alloy was observed by SEM. The results showed that the impact strength of the alloy was increased with the addition of compatibilizer. After PPS was activated by the MDI, the properties of the alloy were improved. When the mass ratio of the PPS/PA46 was 70/30, the mass fraction of SEBS-g-MAH was 9%, the ally had excellent properties of which the impact strength was 8.4 kJ/m2, the tensile strength was 61.2 MPa, the bending strength was 81.5 MPa, and heat distortion temperature was 117℃.