无卤阻燃PPE/PA66合金的制备及性能

Preparation and Properties of Halogen Free Flame Retardant PPE/PA66 Alloys

以多聚芳基磷酸酯和硼酸锌作为阻燃剂制备无卤阻燃聚苯醚(PPE)/尼龙66 (PA66)合金材料。分别讨论了PPE/PA66配比、阻燃剂多聚芳基磷酸酯用量及增容剂马来酸酐接枝聚苯醚(PPE-g-MAH)和增韧剂马来酸酐接枝苯乙烯–乙烯/丁烯–苯乙烯嵌段共聚物(SEBS-g-MAH)用量对PPE/PA66合金体系力学、耐热性能和阻燃性能的影响,并通过扫描电子显微镜观察了增容剂对合金表面形貌的影响。结果表明,PPE/PA66最佳配比为1/1 (质量比),阻燃剂的加入会影响合金材料的力学性能和耐热性,添加多聚芳基磷酸酯和硼酸锌的最优质量分数分别为15%和2%;PPE-g-MAH的加入有效改善了PPE与PA66之间的相容性,但添加量不宜过大,以质量分数6%为宜;SEBS-g-MAH可以有效改善合金的韧性,但会降低合金的阻燃性能,以质量分数5%为宜;最终制备的阻燃PPE/PA66合金材料的阻燃性能可达到V–0级(1.6mm),热变形温度达95.2℃,拉伸强度为61.9MPa,缺口冲击强度为108.4J/m。

Halogen free flame retardant polyphenylene ether(PPE)/nylon 66(PA66)alloy were prepared by using polyaryl phosphate and zinc borate as flame retardants.The effects of ratio of PPE and PA66,contents of polyaryl phosphate,compatibilizer maleic anhydride grafted polyphenylene ether(PPE-g-MAH)and toughening agent maleic anhydride grafted styrene-ethylene/butylene-styrene block copolymer(SEBS-g-MAH)on the mechanical properties,heat resistance and flame retardance of PPE/PA66 alloy were discussed.The influences of the compatibilizer on the surface morphology of the alloys were observed by scanning electron microscopy.The results show that the best ratio of PPE/PA66 is 1/1(mass ratio),the mechanical properties and heat resistance of the alloys are reduced by addition of flame retardants,the optimum mass fraction of polyaryl phosphate and zinc borate are 15%and 2%respectively.The addition of PPE-g-MAH can effectively improve the compatibility between PPE and PA66,but the addition amount should not be too large,the mass fraction of 6%is appropriate.SEBS-g-MAH can effectively improve the toughness of the alloy,but it will reduce the flame retardancy of the alloys,with a mass fraction of 5%.The flame retardancy of the final flame retardant PPE/PA66 alloy can reach V–0 grade(1.6 mm),the thermal deformation temperature is 95.2℃,the tensile strength is 61.9 MPa,the notch impact strength is 108.4 J/m.