PS-g-MAH的制备及其增容PS阻燃复合材料的研究

Study on the Preparation of PS-g-MAH Compatibilized Flame Retardant PS Composites

以聚苯乙烯(PS)为载体,马来酸酐(MAH)为接枝单体,过氧化二异丙苯(DCP)为引发剂,采用熔融接枝法制备了聚苯乙烯接枝马来酸酐共聚物(PS-g-MAH)。考察了MAH用量、DCP用量对PS-g-MAH接枝率的影响。经红外光谱(IR)表征,接枝物为目标产物。将接枝率为3.7%的PS-g-MAH作为PS/膨胀阻燃剂/热塑性弹性体复合材料的增容剂,探讨了增容剂对该复合材料阻燃、力学和加工性能及微观结构的影响。结果表明,当增容剂用量为12份时,冲击强度达到4.89 kJ/m2,比未增容时提高了87.4%,拉伸强度仍可保持在21.3 MPa。在力学性能得到改善的同时,复合材料的垂直燃烧可达到FV-0级,氧指数由27.1%提高到了27.9%,熔体质量流动速率为4.62g/10min。

Using polystyrene （PS） as the carrier, maleic anhydride （MAH） as the grafting monomer and dicumyl peroxide （DCP） as the initiator, the compatibilizer PS-g-MAH was prepared by melt grafting method. The effects of MAH amount, effect of DCP content on the grafting ratio of PS-g-MAH were investigated. The results of IR showed that graft co-polymer was target product. The PS-g-MAH with grafting ratio 3.7% was taken as a compatibilizer of PS/intumescent flame retardant/thermoplastic elastomer composites. The influence of compatibilizer on mechanical properties, flame retardant performance, processability and microstructure was studied. The results showed that when the amount of PS-g-MAH was 12 phr, the impact strength of composites could reach 4.89 kJ/m 2, which increased more than 87.4% compared to that of the composites without compatibilizer, the tensile strength of composites could still maintain 21.3 MPa. Flame retardant performance of PS/intumescent flame retardant/thermoplastic elastomer composites could still reach FV-O rate, the LOI increased from 27. 1% to 27.9% , and its melt flow rate was 4. 62 g/10min while the mechanical properties of PS/intumescent flame retardant/thermoplastic elastomer composites was improved.