苯乙烯-丙烯腈共聚物对聚氯乙烯加工性能及抗紫外老化行为的影响  

Influence of Styrene-Acrylonitrile Copolymer on Processability and Anti Ultraviolet Aging Performance of Poly(Vinyl Chloride)

作　　者：徐文文[1] 陈红[1] 熊英[1] 郭少云[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2017年第5期118-123,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金重点项目(51133005);四川省科技支撑计划(苗子工程)项目(2015RZ0022)

摘　　要：通过苯乙烯-丙烯腈共聚物(SAN)共混改性聚氯乙烯(PVC),制备了PVC/SAN共混材料。利用转矩流变、色差分析、表面形貌分析、元素分析等方法研究了PVC/SAN共混材料的加工性能和抗紫外老化性能。结果表明,SAN的加入可促进PVC的塑化,改善其加工性能;同时SAN具有较强的紫外光吸收能力,能抑制PVC脱氯化氢,显著降低紫外老化时PVC颜色变暗、变红和变黄的速率;此外SAN的引入使PVC/SAN共混材料表面平整、致密,可以有效阻止紫外光和氧气深入到材料内部造成严重的破坏,从而显著提高PVC的抗紫外老化性能。Styrene-acrylonitrile copolymer（SAN） was used to modify poly（vinyl chloride）（PVC）, and PVC/SAN blends were obtained. Then processability and anti ultraviolet aging performance of PVC/SAN blends were studied by torque rheometer, chromatic aberration, SEM, and X-ray photoelectron spectroscopy（XPS）. It is found that adding SAN can decrease the plasticizing time of PVC, indicating that the processability of PVC is improved. Meanwhile, SAN has strong ultraviolet absorption ability, and dehydrochlorination reaction of PVC is inhibited. As a result, PVC/SAN blends has high color stability when aged under ultraviolet light. In addition, surface of PVC/ SAN blends is smooth and dense, leading to limitation of the ultraviolet light and oxygen penetrating inside the material. Therefore, anti ultraviolet aging performance of PVC is significantly improved by addition of SAN.

关 键 词：聚氯乙烯 苯乙烯-丙烯腈共聚物 加工性能 抗紫外老化性能 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]