【摘要】 采用熔融共混方法制备了聚氯乙烯(PVC)与不同接枝率苯乙烯-马来酸酐共聚物(SMA)接枝改性聚酰胺6(PA6-g-SMA)的共混物,研究了PA6-g-SMA接枝率对PVC/PA6-g-SMA共混物力学性能及凝聚态结构的影响。结果表明,接枝率越高,PA6-g-SMA与PVC的相容性越好,在PVC基体中能以更小的相畴均匀分散,对PVC的增韧增强作用越明显;当PA6-g-SMA的接枝率为5.12%,添加量为15%(质量分数,下同)时,共混物的冲击强度为64.7kJ/m2,拉伸强度为55MPa。更多还原

【Abstract】 PA6 was grafted with styrene/maleic anhydride copolymer (PA6-g-SMA)and was subsequently blended with poly(vinyl chloride) (PVC) via melt blending. The effect of grafting ratio of PA6-g-SMA on morphology and mechanical properties of PVC/PA6-g-SMA blends were discussed. A good compatibility between PA6-g-SMA and PVC was identified. With increasing grafting ratio of PA6, the decreasing domain size of PA6-g-SMA and enhanced toughening and reinforcing on PVC were observed. When the graft ratio was 5.12 %, the addition was 15 %, the impact strength of the blend was 64.7 kJ/m2 , the tensile strength of the blend was 55 MPa.更多还原