超支化聚磷酸酯/聚苯乙烯复合材料的性能研究

Study on Performance of Hyperbranched Polyphosphate Ester/Polystyrene Composites

以密炼、模压等工艺制备了超支化聚磷酸酯(HPPE)/聚苯乙烯(PS)复合材料,研究了HPPE的代数和用量对HPPE/PS复合材料性能的影响及其规律性,研究的性能包括拉伸强度、弯曲强度、冲击强度、维卡软化点温度以及熔体质量流动速率,并通过SEM观察其冲击断面的微观形态和研究其增韧机理。结果表明:HPPE/PS复合材料的拉伸强度、冲击强度和熔体质量流动速率随HPPE用量的增加先增加后降低,随HPPE摩尔质量的变化影响较小。在HPPE-2用量为6phr左右,复合材料的综合性能较佳,对比纯PS,拉伸强度可提高124%,冲击强度可提高56%,熔体质量流动速率可提高84%,但弯曲强度和维卡软化点温度有微弱下降。

The effect of hyperbranched polyphosphate ester （HPPE） content and generation on performance of HPPE/polystyrene （PS） composites obtained through banburying and molding technology was studied, the study including tensile strength, flexural strength, impact strength, Vicat softening point and melt flow index. Scanning electron microscopy （SEM） was also used for observing the micro-morphology of the impact fracture surface and studying the toughening mechanism. The results showed that the tensile strength, impact strength and melt flow index of HPPE/PS composites increased firstly and then decreased with the in- crease of HPPE content, the molar mass of HPPE had little effect. HPPE/PS composites showed optimum comprehensive performance while containing 6 phr HPPE-2. Compared to those of pure PS, the tensile strength, impact strength and melt flow index can be enhanced 124%, 56% and 84% respectively, but their flexural strength and Vicat softening point decreased a little.