Uyini umehluko phakathi kwe-TPU ne-PU?

Uyini umehluko phakathiI-TPUkanye ne-PU?

I-TPU (i-polyurethane elastomer)

I-TPU (Thermoplastic Polyurethane Elastomer)iwuhlobo lwepulasitiki olusafufusa.Ngenxa yokucutshungulwa kahle kwayo, ukumelana nesimo sezulu, kanye nobungane bemvelo, i-TPU isetshenziswa kabanzi ezimbonini ezihlobene ezifana nezinto zezicathulo, amapayipi, amafilimu, amarola, izintambo, nezintambo.

I-polyurethane thermoplastic elastomer, eyaziwa nangokuthi irabha ye-thermoplastic polyurethane, efushanisiwe ngokuthi i-TPU, iwuhlobo lwe-(AB) n-block linear polymer.U-A unesisindo samangqamuzana aphezulu (1000-6000) i-polyester noma i-polyether, futhi i-B iyidiyoli equkethe ama-athomu e-carbon chain angu-2-12.Isakhiwo samakhemikhali phakathi kwezingxenye ze-AB yi-disocyanate, ngokuvamile exhunywe yi-MDI.

Irabha ye-Thermoplastic polyurethane incike ekuhlanganisweni kwe-hydrogen ye-intermolecular noma ukuxhumanisa okuthambile phakathi kwamaketanga e-macromolecular, futhi lezi zakhiwo ezimbili ezixhumanisayo ziyakwazi ukuhlehliswa ngokwenyuka noma ukuncipha kwezinga lokushisa.Esimeni esincibilikisiwe noma sokuyisixazululo, amandla e-intermolecular aba buthaka, futhi ngemva kokupholisa noma ukuhwamuka kwe-solvent, amandla aqinile e-intermolecular axhuma ndawonye, ​​abuyisele izakhiwo zokuqinile kwasekuqaleni.

I-polyurethane thermoplastic elastomerszingahlukaniswa zibe izinhlobo ezimbili: i-polyester ne-polyether, enezinhlayiya ezimhlophe ezingavamile eziyindilinga noma zekholomu kanye nokuminyana okuhlobene kwe-1.10-1.25.Uhlobo lwe-polyether lunomthamo ophansi wesihlobo kunohlobo lwe-polyester.Izinga lokushisa lokushintshwa kwengilazi lohlobo lwe-polyether lingu-100.6-106.1 ℃, kanti lelo lohlobo lwe-polyester lingu-108.9-122.8 ℃.Izinga lokushisa le-brittleness lohlobo lwe-polyester nohlobo lwe-polyester liphansi kune--62 ℃, kuyilapho ukumelana nokushisa okuphansi kohlobo lwe-ether eqinile kungcono kunohlobo lwe-polyester.

Izici ezivelele ze-polyurethane thermoplastic elastomers ukumelana okuhle kakhulu kokugqokwa, ukumelana ne-ozone okuhle kakhulu, ukuqina okuphezulu, amandla aphezulu, ukunwebeka okuhle, ukumelana nokushisa okuphansi, ukumelana nowoyela okuhle, ukumelana namakhemikhali, nokumelana nemvelo.Ezindaweni ezinomswakama, ukuzinza kwe-hydrolysis ye-polyether ester kudlula kude lokho kwezinhlobo ze-polyester.

Ama-elastomer e-polyurethane thermoplastic awanabo ubuthi futhi awanuki, ancibilika kuzincibilikisi ezifana ne-methyl ether, i-cyclohexanone, i-tetrahydrofuran, i-dioxane, ne-dimethylformamide, kanye nezincibilikisi ezixubile ezakhiwe i-toluene, i-ethyl acetate, i-butanone, ne-acetone ngezilinganiso ezifanele.Zibonisa isimo esingenambala nesisobala futhi zinokuzinza okuhle kwesitoreji.