PS/HDPE无卤阻燃复合材料的增韧研究

以弹性体为增韧剂,聚苯乙烯接枝马来酸酐(PS-g-MAH)为增容剂,聚磷酸铵、季戊四醇膨胀阻燃体系复配微胶囊化红磷为阻燃剂,制备了聚苯乙烯/高密度聚乙烯(PS/HDPE)无卤阻燃复合材料,考察了PS与HDPE配比、弹性体种类及用量、PS-g-MAH接枝率及用量对复合材料力学性能及微观结构的影响。结果表明:当PS:HDPE=75:25时,复合材料的冲击强度提高至1.41kJ/m2;SEBS与SBS配比为1:1.7时,可使PS/HDPE无卤阻燃复合材料的拉伸强度增至21.3MPa,冲击强度达到2.81kJ/m2;添加12份接枝率为3.7%的PS-g-MAH后,PS/HDPE/SEBS/SBS无卤阻燃复合材料的冲击强度达到了4.89kJ/m2。

Study on Toughening of Halogen-free Flame-retarded PS/HDPE Composite

Taking elastomer as toughening agent, PS-g-MAH as compatibilizer, ammonium polyphosphate (APP) and pentaerythritol (PER) compounding with microcapsuled red phosphorus (MRP) as flame retardant, the halogen-free flame-retarded PS/HDPE composite was prepared. The effects of PS/HDPE ratio, kinds and content of elastomer, graft ratio and content of PS-g-MAH on mechanical properties and microstructure of the composite were studied. The results show that when PS:HDPE=75:25, the impact strength of the composite is increased to 1.41 kJ/m2; when SEBS:SBS= 1:1.7, the tensile strength of PS/HDPE helagon-free flame-retarded composite is increased to 21.3 MPa, the impact strength is increased to 2.81 kJ/m2; after the addition of 12 phr PS-g-MAH with graft ratio of 3.7%, the impact strength of halogen-free flame-retarded PS/ HDPE/SEBS/SBS composite is increased to 4.89 kJ/m2.