55加工与应用NO.022023塑料科技PlasticsScienceandTechnology高透明聚氨酯脲弹性体的制备与性能王玉龙,丁晓晨,刘俊华,张银柱,边祥成（太原工业学院材料工程系，山西太原030008）摘要：以聚四氢呋喃醚二醇（PTMG）为软段，4，4'-二环己基甲烷二异氰酸酯（HMDI）和异佛尔酮二胺（IPDA）为硬段，采用预聚体法制备四种高透明的聚氨酯脲（PUU）弹性体。对PUU弹性体进行红外光谱、紫外光谱、力学性能、热学性能和流变性能等测试。结果表明：四种透明PUU弹性体均为无定型结构，在450nm处紫外透过率均高于89.8%。随着硬段含量的增加，PUU弹性体的硬度、100%定伸模量和拉伸强度均增加，而断裂伸长率下降。PUU-2.7的硬度、100%定伸模量和拉伸强度分别达到92.5、18.3MPa和53.7MPa。PUU-1.5试样只有一个玻璃化转变温度，微相分离程度最低。硬段含量的增加，使PUU弹性体硬段间氢键作用增强，微相分离程度增大。关键词：聚氨酯脲；透明性；力学性能；氢键作用中图分类号：TQ323.8文献标识码：A文章编号：1005-3360（2023）02-0055-04DOI：10.15925/j.cnki.issn1005-3360.2023.02.011PreparationandPropertiesofHighTransparentPolyurethaneUreaElastomerWANGYu-long,DINGXiao-chen,LIUJun-hua,ZHANGYin-zhu,BIANXiang-cheng(DepartmentofMaterialsEngineering,TaiyuanInstituteofTechnology,Taiyuan030008,China)Abstract：Fourhighlytransparentpolyurethaneurea(PUU)elastomerswerepreparedbyprepolymermethodusingpolytetrahydrofuranetherglycol(PTMG)assoftsegment,4,4'-dicyclohexylmethanediisocyanate(HMDI)andisophoronediamine(IPDA)ashardsegment.ThePUUelastomerwastestedbyinfraredspectroscopy,ultravioletspectroscopy,mechanicalproperties,thermalpropertiesandrheologicalproperties.TheresultsshowthatthefourtransparentPUUelastomersareamorphousstructures,andtheUVtransmittanceat450nmishigherthan89.8%.Withtheincreaseofhardsegmentcontent,thehardness,modulusat100%elongationandtensilestrengthofPUUelastomerincrease,whiletheelongationatbreakdecreases.Thehardness,modulusat100%elongationandtensilestrengthofPUU-2.7are92.5,18.3MPaand53.7MPa,respectively.PUU-1.5samplehasonlyoneglasstransitiontemperatureandthelowestdegreeofmicrophaseseparation.Withtheincreaseofhardsegmentcontent,thehydrogenbondingbetweenhard...
