Uyini umehluko phakathi kweTPU ne-PU?

Uyini umehluko phakathiI-TPUFuthi uPu?

I-TPU (Polyurethane Elastomer)

I-TPU (Thermoplastic Polyurethane Elastomer)kuyizinhlobonhlobo zepulasitiki ezivelayo. Ngenxa yokucubungula kwayo okuhle, ukumelana nesimo sezulu, kanye nobungani bendawo, i-TPU isetshenziswa kabanzi kwizimboni ezihlobene nezinto ezinezicucu, amapayipi, amafilimu, ama-roller, amakhebula nezintambo.

I-Polyurethane Thermoplastic Elastomer, eyaziwa nangokuthi i-thermoplastic polyurethane irabha, ifinyezwe njenge-TPU, uhlobo (ab) n-block line pulmer. Isisindo esiphakeme se-molecular (1000-6000) polyester noma i-polyther, futhi b iyi-diol equkethe ama-athomu ka-2-12 aqonde ama-chain carbon. Isakhiwo samakhemikhali phakathi kwezigaba ze-AB yi-diisocyanate, imvamisa exhunywe yi-MDI.

I-Thermoplastic polyurethane irabha ithembele ekubondlweni kwe-hydrogen ye-hydrogen noma ukuxhumeka okuncane phakathi kwamaketanga ama-macromolecal, futhi lezi zinhlaka ezimbili zokuxhumanisa ziguqulwa ngokwanda noma okunciphile izinga lokushisa elikhulayo. Esimweni esibiwe noma solulu, amabutho ahlukene abuthaka, nangemva kokuphola noma ukuphuma kwe-solvent, amabutho aqinile we-intermolecular axhumeka ndawonye, ​​abuyisele izakhiwo eziqinile.

Ama-polyurethane thermoplastic lastomersIngahlukaniswa ngezinhlobo ezimbili: I-Polyester ne-polythelekile, enezinhlayiya ezimhlophe ezingekho emthethweni noma ze-columnar kanye nobuningi obuhlobene ka-1.10-1.25. Uhlobo lwe-polythere lunesilinganiso esisezingeni eliphansi kunohlobo lwe-polyester. Izinga lokushisa le-Glass lokushintshwa kwe-polyther hlobo lwe-100.6-106.1 ℃, kanye nokuthi uhlobo lwe-polyester lungu-108.9-122.8 ℃. Izinga lokushisa le-brittleness of polythere kanye nohlobo lwe-polyester liphansi kune -62 ℃, kuyilapho ukumelana kwamazinga okushisa okuphansi kohlobo olunzima lwe-ether kungcono kunalokho kwe-polyester thayipha.

Izici ezivelele ze-polyurethane thermoplastic elatomers zinokuqina okuhle kakhulu, ukumelana okuhle kwe-ozone, ukuqina okuphezulu, ukumelana kwamafutha aphansi, ukumelana namafutha aphansi, ukumelana kwamakhemikhali kanye nokumelana kwemvelo. Ezindaweni ezinomswakama, ukuqina kwe-hydrolysis kwama-polyther ezs kudlula kudlula lezo zinhlobo ze-polyester.

Ama-polyurethane thermoplastic elatomers angewona anobuthi futhi anephunga, ancibilika ama-solvents anjenge-methyl ether, i-yyclohexanone, ne-tetrahydrofe, kanye nama-solvete ahlanganisiwe ahlanganiswe noTolune, ethyl acetate, i-acetone, kanye ne-acetone ezilinganisweni ezifanele. Babonisa umbuso ongenamibala futhi obonakalayo futhi banokuqina okuhle kwesitoreji.