The effects of chlorinated polyethylene (CPE) and antimony trioxide (Sb₂O₃) on the flame retardancy and mechanical properties of the recycled polyvinyl chloride/acryl-butadiene-styrene (R–PVC/ABS) blends were investigated. The tensile strength of the blends with 40 wt% ABS, 35 wt% R–PVC and 25 wt% PVC was close to that of ABS. Both the limiting oxygen index and the vertical burning level were significantly improved, and the blends reached a flame retardant level. The notched impact strength was significantly improved with the addition of CPE. The SEM observed interpenetrating CPE network structure in the blends resulted in a significant ductile fracture of the blends. With the addition of Sb₂O₃, the limiting oxygen index and vertical burning grade of the blends were further improved; and the heat release rate, total heat of release and mass loss were significantly reduced. When the addition amount of CPE and Sb₂O₃ was 8 wt% and 6 wt% respectively, the tensile strength of the blends was 63.5 MPa, the notched impact strength was 9.2 kJ m⁻², the limiting oxygen index was 31.3%, and the vertical burning grade reached V₀ level. This study provides a way to reuse the polyvinyl chloride with enhanced properties.

研究了氯化聚乙烯（CPE）和三氧化二锑（Sb ₂ O ₃）对回收的聚氯乙烯/丙烯酸-丁二烯-苯乙烯（R-PVC / ABS）共混物的阻燃性和机械性能的影响。具有40 wt％ABS，35 wt％R–PVC和25 wt％PVC的共混物的拉伸强度接近ABS。极限氧指数和垂直燃烧水平都得到了显着改善，共混物达到了阻燃水平。添加CPE可以明显提高缺口冲击强度。SEM观察到共混物中互穿的CPE网络结构导致共混物显着的韧性断裂。加上Sb ₂ O ₃进一步提高了共混物的极限氧指数和垂直燃烧度。放热率，释放总热量和质量损失明显降低。当CPE和Sb ₂ O ₃的添加量分别为8 wt％和6 wt％时，共混物的拉伸强度为63.5 MPa，缺口冲击强度为9.2 kJ m ^-2，极限氧指数为31.3％，垂直燃烧等级达到V ₀级。这项研究提供了一种重复使用具有增强性能的聚氯乙烯的方法。