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采用芳纶浆粕(PPTA-pulp)对膨胀阻燃聚丙烯(PP)进行增强改性,通过一步共混法制备了PPTA-pulp-膨胀型阻燃剂(IFR)/PP阻燃复合材料,考察了PPTA-pulp用量对PPTA-pulp-IFR/PP复合材料的力学性能、阻燃性能及热稳定性能的影响。结果表明,当硅烷偶联剂KH-550处理的PPTA-pulp质量比为5%时,膨胀阻燃复合材料的力学性能达到最佳:拉伸强度40.0MPa,冲击强度56.9J·m-1,极限氧指数LOI 28%,垂直燃烧等级达到UL-94V-0级。复合材料的热稳定性能提高,炭残余量增加。SEM观察表明,PPTA-pulp经KH-550处理后,浆粕纤维与基体树脂的结合性较好。
The flame retardant polypropylene (PP) was reinforced by aramid pulp (PPTA-pulp). The PPTA-pulp-intumescent flame retardant (IFR) / PP flame- The effects of PPTA-pulp dosage on the mechanical properties, flame retardancy and thermal stability of PPTA-pulp-IFR / PP composites were investigated. The results showed that the mechanical properties of the intumescent flame retardant composites reached the best when the mass ratio of PPTA-pulp treated by silane coupling agent KH-550 was 5%: tensile strength 40.0MPa, impact strength 56.9J · m-1, Limit Oxygen Index LOI 28%, vertical combustion rating to UL-94V-0 level. The thermal stability of the composite material is improved, and the carbon residue is increased. SEM observation showed that the pulp fiber and the matrix resin had better binding property after the PPTA-pulp was treated by KH-550.