软段组成对聚氨酯软泡性能的影响  

Effect of Soft Segment Composition on the Properties of Flexible Polyurethane Foam

作　　者：张均 李满霞 姜志国 姚明[3] ZHANG Jun;LI Manxia;JIANG Zhiguo;YAO Ming(High-tech Research Institute,Beijing University of Chemical Technology,Beijing 100029,China;JINNENG Chemical(Qingdao)Co.Ltd,Qingdao 266400,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学高新技术研究院,北京100029 [2]金能化学(青岛)有限公司,山东青岛266400 [3]北京化工大学材料科学与工程学院,北京100029

出　　处：《聚氨酯工业》2024年第5期14-17,共4页Polyurethane Industry

摘　　要：以聚四氢呋喃二醇PTMG2000、聚醚三醇EP-330N、聚合物多元醇POP-3628和聚醚三醇CHK-3602中的至少2种为软段原料,配以相同助剂组成多元醇组分,以MDI型半预聚体为异氰酸酯组分,制备了4种聚氨酯软泡,研究了软段组成对泡沫密度、力学性能和吸水性能的影响。结果表明:在发泡原料配比、异氰酸酯指数、发泡剂用量相同的条件下,多元醇种类和含量对聚氨酯软泡的性能影响显著。自由发泡条件下,制备的聚氨酯软泡密度范围为77.0~116.7 kg/m^(3);以EP-330N为主要软段组分的泡沫,其拉伸强度为244 kPa、断裂伸长率为183%、吸水率为293.3%;以POP-3628为主要软段组分的泡沫,其拉伸强度为313 kPa、断裂伸长率167%、吸水率为328.9%;以CHK-3602为主要软段组分的泡沫,其拉伸强度为249 kPa、断裂伸长率为282%、吸水率为543.5%。Four flexible polyurethane foams were prepared by using at least two of the polytetrahydrofuran diol PTMG2000,polyether triol EP-330N,polymer polyol POP-3628 and polyether triol CHK-3602 as soft segment with the same additives forming polyol components,and MDI-type semi-prepolymers as isocyanate components.The effects of soft segment composition on foam density,mechanical properties and water absorption were studied.The results showed that the type and content of polyol had significant influence on the properties of the flexible polyurethane foam under the same foaming raw material ratio,isocyanate index and foaming agent dosage.Under the condition of free foaming,the density of the prepared flexible polyurethane foam was 77.0~116.7 kg/m^(3).The foam with EP-330N as the main soft segment had a tensile strength of 244 kPa,elongation at break of 183%and water absorption rate of 293.3%.The foam with POP-3628 as the main soft segment had a tensile strength of 313 kPa,elongation at break of 167%and water absorption rate of 328.9%.The foam with CHK-3602 as the main soft segment had a tensile strength of 249 kPa,elongation at break of 282%and water absorption rate of 543.5%.

关 键 词：聚氨酯 软泡 软段 拉伸强度 吸水率 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]