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Effects of chlorinated polyethylene and antimony trioxide on recycled polyvinyl chloride/acryl-butadiene-styrene blends: Flame retardancy and mechanical properties

Yingchun Li,Lida Lv,Wensheng Wang,Jiaoxia Zhang,Jing Lin,Juying Zhou,Mengyao Dong,Yuanfa Gan,Ilwoo Seok,Zhanhu Guo

Published 2020 in Polymer

ABSTRACT

Abstract 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.

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