中高密度聚氨酯软泡耐热性的研究  

Study on Heat Resistance of Flexible Polyurethane Foams with Medium-High Density

作　　者：赵修文 张莉 李博 张利国 张涛 赵卫鸣 ZHAO Xiuwen;ZHANG Li;U Bo;ZHANG Liguo;ZHANG Tao;ZHAO Weiming(Liming Chemical Research and Design Institute Co.Ltd,Luoyang,Henan 471000,China)

机构地区：[1]黎明化工研究设计院有限责任公司,河南洛阳471000

出　　处：《聚氨酯工业》2018年第2期16-19,共4页Polyurethane Industry

基　　金：国家重点研发计划(编号:2016YFB0301903)

摘　　要：通过热机械分析法(TMA)考察了聚氨酯软泡密度对其耐热性的影响,以及配方中抗氧剂、聚醚多元醇、扩链交联剂以及异氰酸酯对密度为400 kg/m^3的聚氨酯软泡耐热性的影响。结果表明,泡沫密度越大,其软化温度越高,亚磷酸酯类抗氧剂AT-a有助于改善耐热性,可将泡沫的软化温度从176℃提高到201℃,以551C/PPG-1混合聚醚多元醇、聚合MDI/氨酯改性MDI混合多异氰酸酯以及1,4-丁二醇等为原料制得的400 kg/m^3密度的聚氨酯软泡耐热性较好,软化温度可达到266℃。高低温交变实验表明,泡沫的交联度越高,耐热性越好。The influence of foam density on heat resistance of flexible polyurethane foam was investigated by thermal mechanical analysis(TMA).The effects of antioxidant,polyether polyols,chain crosslinking agent and isocyanates on heat resistance of polyurethane foam with density of 400 kg/m3 were also investigated.The results showed that the higher the foeim density was,the higher the softening temperature was.The phosphite antioxidant AT-a was helpful to improve the heat resistance,the softening temperature of the foam could be increased from 176℃to 201℃.With 551C and PPG-1 as the polyether polyol combination,PMDI and urethane modified MDI as isocyanate combination,butanediol as chain extender,the foam had better heat resistance,the softening temperature could reach 266℃.High and low temperature alternating experiments showed that the foam with higher crosslinking degree had better heat resistance.

关 键 词：聚氨酯 软质泡沫塑料 耐热性 高低温交变实验 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]