Phapang ke efe pakeng tsaTPUle PU?
TPU (polyurethane elastomer)
TPU (Thermoplastic Polyurethane Elastomer)ke mofuta o hlahang oa polasetiki. Ka lebaka la ho sebetsa ha eona hantle, ho hanyetsa boemo ba leholimo, le botsoalle ba tikoloho, TPU e sebelisoa haholo liindastering tse amanang le eona tse kang thepa ea lieta, liphaephe, lifilimi, lirolara, likhoele le lithapo.
Elastomer ea thermoplastic ea polyurethane, e tsejoang hape e le rabara ea polyurethane ea thermoplastic, e khutsufalitsoeng e le TPU, ke mofuta oa polymer e otlolohileng ea (AB) n-block. A ke polyester kapa polyether e boima bo phahameng ba limolek'hule (1000-6000), 'me B ke diol e nang le liathomo tsa carbon tse 2-12 tse otlolohileng. Sebopeho sa lik'hemik'hale pakeng tsa likarolo tsa AB ke diisocyanate, hangata e hokahanngoa ke MDI.
Rabara ea polyurethane ea thermoplastic e itšetlehile ka ho hokahana ha haedrojene pakeng tsa limolek'hule kapa ho hokahana ho bobebe pakeng tsa liketane tsa macromolecular, 'me meaho ena e 'meli ea ho hokahana e ka fetoloa ka mocheso o ntseng o eketseha kapa o fokotsehang. Boemong ba ho qhibilihisoa kapa tharollo, matla a limolek'hule aa fokola, 'me ka mor'a ho pholile kapa ho fetoha ha mouoane oa solvent, matla a matla a limolek'hule aa kopana, a tsosolosa litšobotsi tsa se tiileng sa pele.
Li-elastomer tsa thermoplastic tsa polyurethanee ka aroloa ka mefuta e 'meli: polyester le polyether, e nang le likaroloana tse tšoeu tse sa tloaelehang tse chitja kapa tse kholomo le boima bo lekanyelitsoeng ba 1.10-1.25. Mofuta oa polyether o na le boima bo tlaase bo lekanyelitsoeng ho feta mofuta oa polyester. Mocheso oa phetoho ea khalase oa mofuta oa polyether ke 100.6-106.1 ℃, 'me oa mofuta oa polyester ke 108.9-122.8 ℃. Mocheso oa ho robeha ha bonolo oa mofuta oa polyether le mofuta oa polyester o tlase ho feta -62 ℃, ha khanyetso e tlase ea mocheso oa mofuta oa ether e thata e le betere ho feta oa mofuta oa polyester.
Litšobotsi tse ikhethang tsa li-elastomer tsa polyurethane thermoplastic ke ho hanyetsa ho tsofala ho hoholo, ho hanyetsa ozone ho hoholo, ho thatafala ho hoholo, matla a phahameng, ho tenyetseha ho hoholo, ho hanyetsa mocheso o tlase, ho hanyetsa oli ho hoholo, ho hanyetsa lik'hemik'hale le ho hanyetsa tikoloho. Libakeng tse mongobo, botsitso ba hydrolysis ba li-ester tsa polyether bo feta hōle ba mefuta ea polyester.
Li-elastomer tsa polyurethane thermoplastic ha li na chefo ebile ha li na monko, li qhibiliha ka har'a metsoako e kang methyl ether, cyclohexanone, tetrahydrofuran, dioxane, le dimethylformamide, hammoho le metsoakong e tsoakiloeng e entsoeng ka toluene, ethyl acetate, butanone le acetone ka tekanyo e loketseng. Li bontša boemo bo se nang 'mala le bo bonaletsang 'me li na le botsitso bo botle ba polokelo.
Nako ea poso: Mmesa-22-2024