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软段结构对脂肪族聚氨酯弹性体的结构与性能影响
引用本文:陈亚洪,沈泉锦,王贵友.软段结构对脂肪族聚氨酯弹性体的结构与性能影响[J].聚氨酯工业,2014(6):17-21.
作者姓名:陈亚洪  沈泉锦  王贵友
作者单位:1. 泛亚汽车技术中心有限公司 上海201201
2. 华东理工大学材料科学与工程学院 上海200237
基金项目:上海汽车工业科技发展基金会项目“轿车发动机排气管中央通道复合型隔热反射垫的研究开发”(项目编号0711)。
摘    要:分别采用聚丙二醇(PPG)、聚四氢呋喃二元醇(PTMG)、聚己二酸一缩二乙二醇三羟甲基丙烷酯多元醇(726)和聚己二酸新戊二醇酯二元醇(756)4种不同软段制备了基于异佛二酮二异氰酸酯(IPDI)的脂肪族聚氨酯弹性体(PUE),并通过FT-IR、DSC和TGA等表征了软段结构对PUE结构与性能的影响。结果表明,在相同硬段含量的条件下,PTMG制备的PUE具有最高的交联密度和最低的氨酯羰基氢键化程度。聚酯型PUE的耐热性和热氧老化性能均优于聚醚型PUE,由756合成的PUE具有最好的老化性能和热稳定性。

关 键 词:脂肪族聚氨酯  弹性体  软段结构  形态  力学性能  耐热性能

Effect of Soft Segment on the Structure and Properties of Aliphatic Polyurethane Elastomer
Chen Yahong,Shen Quanjing,Wang Guiyou.Effect of Soft Segment on the Structure and Properties of Aliphatic Polyurethane Elastomer[J].Polyurethane Industry,2014(6):17-21.
Authors:Chen Yahong  Shen Quanjing  Wang Guiyou
Affiliation:Chen Yahong;Shen Quanjing;Wang Guiyou;Pan Asia Technical Automotive Center Co. Ltd;School of Materials Science and Engineering,East China University of Science and Technology;
Abstract:The aliphatic polyurethane elastomers (PUE) based isophorone diisocyanate (IPDI) were prepared from four kinds of soft segment polypropylene glycol, poly (tetramethylene ether glycol (PTMG), poly (neopentyl glycol adipate) glycol and poly (diethylene glycol-eo-trimethylolpropane adipate) glycol, respectively. The struc- ture and properties of these PUEs were investigated by FT-IR, DSC and TGA, etc. The results showed that PUE pre- pared from PTMG had the highest crosslink density and the lowest degree of hydrogen bond in urethane carbonyl. However, PUEs based on polyester glycol had better thermal properties and aging properties than the PUEs based on polyether glycol. The polyurethane elastomer prepared from poly (neopentyl glycol adipate) glycol had the best thermal and aging properties.
Keywords:aliphatic polyurethane  elastomer  soft segment structure  morphology  mechanical property  ther-mal property
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