综述了丙烯腈-丁二烯-苯乙烯共聚物（ABS）、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物（MBS）、丙烯腈-氯化聚乙烯-苯乙烯共聚物（ACS）和丙烯腈-苯乙烯-丙烯酸酯共聚物（ASA）等苯乙烯类聚合物与聚氯乙烯共混得到的四种共混体系紫外光降解研究进展。其中，由于ABS和MBS主链结构中含有不饱和双键，在紫外光作用下易氧化降解，所以与聚氯乙烯共混体系耐候性较差；而ACS和ASA主链结构不含有不饱和双键，与聚氯乙烯的共混体系耐候性较好。% This paper reviewed the research progress of UV degradation of poly(vinyl chloride)(PVC)/styrene-containing polymers blends. The four styrene-containing polymers were acrylonitrile-butadiene-styrene copolymer(ABS), methyl methacrylate-butadiene-styrene copolymer(MBS),acrylonitrile-chlorinated polyethy-lene-styrene copolymer(ACS) and acrylonitrile-styrene-acrylate copolymer(ASA). The reason that the PVC/ABS and PVC/MBS blends showed poor aging resistance was that there were unsaturated double bonds in the main chain of ABS and MBS and the unsaturated double bonds occurred oxidative degradation easily by UV irra-diation. On the contrary, the PVC/ACS and PVC/ASA blends showed relatively good aging resistance since there were no unsaturated double bonds in the main chain of ACS and ASA.
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