SEBS-g-MAH对PPO／HIPS／滑石粉复合体系形态及力学性能的影响

Effects of SEBS-g-MAH on Morphology and Mechanical Properties of PPO/HIPS/Talc Composites

采用扫描电镜、力学和流变测试等手段研究了苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)对聚苯醚(PPO)/高抗冲聚苯乙烯(HIPS)/滑石粉复合体系相容性和力学性能的影响。结果表明,滑石粉的加入使复合体系的拉伸强度略有降低,断裂伸长率和冲击性能降低较严重;SEBS-g-MAH能起到界面增容作用,有利于填料的分散和增强界面相互作用,提高了复合体系的韧性。文中进一步讨论了SEBS-g-MAH的加入对复合体系加工流变行为的影响,结果表明,SEBS-g-MAH的加入提高了复合体系在低剪切速率下的表观黏度,使材料剪切敏感性增加。

Effects of SEBS-g-MAH on morphology and mechanical properties of PPO/HIPS/talc composites were studied through scanning electron microseopy, mechanical and rheological testing. The experimental results show that the addition of ST-Talc resultes in the slight decrease of tensile strength and serious decrease of elongation at break and impact performance in the composites. SEBS-g-MAH plays as interface compatibilizer to enhance the dispersion of the filler and interracial interaction between the talc and matrix, therefore, toughness of the composite is improved. The capillary rheological behaviors of the composites are also studied. The results show that the addition of SEBS-g-MAH improves the apparent viscosity of the composite system in the low shear rate and increases the shear sensitivity.