应用化学2017，Vol.34Issue(10)：1110-1116,7.DOI:10.11944/j.issn.1000-0518.2017.10.170231
多元醇对对苯二异氰酸酯基聚氨酯微孔弹性体的形态与性能影响
Effect of Polyols on the Morphology and Properties of 1 ,4-Phenylene Diisocyanate-Based Microcellular Polyurethane Elastomers
摘要
Abstract
Microcellular polyurethane elastomers were obtained by a two-step polymerization using 1 ,4-phenylene diisocyanate (PPDI ),1,4-butanediol (BDO ),water,polyethylene tetrahydrofuran ether polyol (PTMEG ) and hydrogenated hydroxyl-terminated butadiene polyols (HLBH ) as raw materials. Fourier reflection infrared (FTIR-ATR ),dynamic mechanical analysis (DMA ),differential scanning calorimetry (DSC),universal material testing machine,dynamic fatigue testing machine were used to systematically characterize the microphase separation,low temperature resistance,dynamic heat build-up of the samples. The results show that the microcellular size of the specimens based on two polyols is 100~300μm wherein the 150 μm is the majority,indicating that the structure of polyols has little influence on the microcellular size. Due to more H-bonds between hard segments,HLBH-based microcellular polyurethane elastomers show better microphase separation than that of PTMEG. There is a wide modulus platform region at -30~150 ℃ in the modulus-temperature curve for HLBH-based specimens due to its proper microphase separation structure. However,due to the crystallization of the soft segments at low temperature,the modulus of PTMEG-based specimens increases dramatically under 0 ℃. The stiffness of HLBH-based specimens surpasses that of PTMEG-based specimens at low temperature,and the hysteresis heat production of HLBH-based specimens is less than that of PTMEG-based specimens. Therefore,the former shows better dynamic fatigue performance.关键词
聚氨酯材料/聚氨酯微孔弹性体/微相分离/低温/对苯二异氰酸酯Key words
polyurethane material/microcellular polyurethane elastomer/microphase separation/low temperature/phenylene diisocyanate分类
化学化工引用本文复制引用
郇彦,李肖肖,田雨濛,王杰,杨小牛..多元醇对对苯二异氰酸酯基聚氨酯微孔弹性体的形态与性能影响[J].应用化学,2017,34(10):1110-1116,7.基金项目
吉林省重点科技攻关项目资助(20160204031GX) Supported by the Jilin Province Key Scientific and Technological Projects(No. 20160204031GX) （20160204031GX）
