增韧剂对废聚苯乙烯的力学性能、HDT、VST及尺寸稳定性的影响  

Influence of toughening agent on mechanical performance,HDT,VST and dimensional stability of waste polystyrene

作　　者：李湘 方松刚 徐娟 殷洁 Li Xiang;Fang Songgang;Xu Juan;Yin Jie(Hunan Chemical Vocational Technology College,Zhuzhou 412000,China)

机构地区：[1]湖南化工职业技术学院,湖南株洲412000

出　　处：《化学推进剂与高分子材料》2022年第6期59-61,65,共4页Chemical Propellants & Polymeric Materials

摘　　要：研究了苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)和高胶粉对废电视机后壳料聚苯乙烯(F-PS)的力学性能、尺寸稳定性、热变形温度(HDT)和维卡软化点温度(VST)的影响,结果表明:SBS和高胶粉在F-PS中有协同增韧作用,在F-PS中复配加入w=6%的SBS和w=2%的高胶粉时,材料的缺口冲击强度从4.5 kJ/m^(2)提高到7.6 kJ/m^(2),增加量为3.1 kJ/m^(2),比单独添加w=8%的SBS的缺口冲击强度(6.9 kJ/m^(2))高0.7 kJ/m^(2),伸长率从28.6%提高到36.7%,增加量为8.1个百分点;高胶粉和SBS都可提高F-PS的尺寸稳定性,但会使F-PS的HDT和VST降低。The influence of styrene-butadiene-styrene block copolymer(SBS)and high rubber powder on the mechanical performance,dimensional stability,heat distortion temperature(HDT)and Vicat softening point temperature(VST)of polystyrene,the back cover material of waste TV sets(F-PS)was investigated.The results showed that SBS and high rubber powder had a synergetic toughening effect in F-PS,when 6%(w)of SBS and 2%(w)of high rubber powder were compounded and added into F-PS,the notch impact strength of the material increased from 4.5 kJ/m^(2) to 7.6 kJ/m^(2) with an increase of 3.1 kJ/m^(2),which was 0.7 kJ/m^(2) higher than the notch impact strength(6.9 kJ/m^(2))of F-PS when 8%(w)of SBS was added alone,the elongation increased from 28.6%to 36.7%with an increase of 8.1 percentage point;both of high rubber powder and SBS could improve the dimensional stability of F-PS,but would reduce DHT and VST of F-PS.

关 键 词：电视机后壳 尺寸稳定性 热变形温度 维卡软化点温度 协同作用 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]