TPEE/45D杜邦--TPEEisakindofblockcopolymercontainingaromaticpolyestersegment(crystallinephase)andaliphaticpolyesterorpolyethersoftsegment(continuousphase),alsoknownaspolyesterrubber.TPEEisalinearblockcopolymerwhosestrengthisproducedinthepolyesterblock,orhardblock,ofcrystallinephaseanddispersedintheamorphoussoftblockascontinuousphase.Thecontinuousphaseiscomposedofsoftsegmentsandotherpolyesterblockswhicharenotcrystallized.Thewholeelastomeriscomposedofacontinuousamorphousnetworkandapartofcontinuouscrystallinenetwork.Whentheelastomerundergoesanexternalforce,thestressisfirsttran***ittedtothecrystallinephasethroughtheconnectingmolecules.Whenthemicrocrystallineisorientedbytheforce,thestressistran***ittedtothenetworkstructureofthecopolymer,andthefinalelasticregionbearsallthestress,andthecopolymerproduceselasticstrainjustlikethecrosslinkedelastomer.TPEEhasoutstandinghighandlowtemperatureproperties,goodheatresistance,noweightlossaftercontinuousheatingat110-140℃for10hours,goodlowtemperatureflexibilityandhighlowtemperatureimpactstrength.Undertheconditionoflowstrain,TPEEhashighermodulusofelasticitythanotherthermoplasticelastomerswiththesamehardness,andhasexcellentfatigueresistance;compressionmodulusandtensilemodulusofelasticityaremuchhigherthanTPU.Aboveroomtemperature,TPEEhashighermodulusofelasticityinbending,butnotashardasTPUatlowtemperature;acidandalkaliresistanceisbetterthanTPV(TPO);intermsofelasticity,TPEEhasabout20%higherelasticitythanTPU.ButthebiggestproblemofTPEEisthelackofsoftness,poorhotwaterresistanceandhighprice.TPEEiswidelyusedinautomobilefieldbecauseofitsexcellentcomprehensiveperformance.TPEEshowsitsuniqueadvantageswhenusedasthematerialofairbagcoverplateTPEE是美国杜邦Dupont早在1962年就在实验室中被开发出来,1972年开始商品化,1984年在欧洲大量的生产。Hytrel作为杜邦公司热塑性聚酯弹性体TPEE品牌一直沿用至今,稳定的生产工艺保证了其产品出色的性能,在聚酯弹性体TPEE产品中享有盛誉。上海和氏璧化工有限公司(NCMHersbitChemical)作为杜邦公司信赖的合作伙伴,通过了杜邦公司严格的认证,拥有着Hytrel产品中国区指定经销权,帮助杜邦公司将Hytrel产品推广到各种行业,配合工程师无穷无尽的创意,给予用户极大的动力,开发出节省成本、改进性能、减少重量的创新型业务的组件和产品。大约有35%用于工业橡胶制品，例如胶管、胶带；20%为汽车配件方面；其余为家电使用，如消音齿轮、电话编码器卡等。缺点是硬度大，不易制出柔软的制品，同时耐压缩变形性、耐热水性和耐强酸性都较差。此外，质量的均一性和价格也都是问题，故而多年来一直在对其进行改进。美GeneralElectric(Valox)、荷兰AkzoChem.(Arnite1)、日本东洋纺(Pelprene)等***的大化工公司都已涉足TPEE开发并开始实现商业化生产。新改进的TPEE有，以聚己内酯为软链段的聚酯—醚共聚物，可以提高其耐水解性、耐寒性，进一步改进耐热、耐天候性和机械强度。还有与PA、PC类共混的聚合物合金、超耐热的TPEE和耐天候的TPEE等，主要用于汽车的外板以及外装部件。)