Phapano ke efe pakeng tsaTPUle PU?
TPU (polyurethane elastomer)
TPU (Thermoplastic Polyurethane Elastomer)ke mofuta oa polasetiki o hlahang.Ka lebaka la ts'ebetso ea eona e ntle, ho hanyetsa boemo ba leholimo, le botsoalle ba tikoloho, TPU e sebelisoa haholo liindastering tse amanang le tsona joalo ka thepa ea lieta, liphaephe, lifilimi, lirolara, likhoele le mehala.
Polyurethane thermoplastic elastomer, e tsejoang hape e le rabara ea thermoplastic polyurethane, e khutsufalitsoeng joalo ka TPU, ke mofuta oa (AB) n-block linear polymer.A ke boima bo phahameng ba molek'hule (1000-6000) polyester kapa polyether, '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 disocyanate, hangata e kopantsoe ke MDI.
Thermoplastic polyurethane rabara e itšetlehile ka bonding ba hydrogen kapa intermolecular cross-linking pakeng tsa liketane tsa macromolecular, 'me likarolo tsena tse peli tse hokahanyang li ka khutlisetsoa morao ka mocheso o ntseng o eketseha kapa o fokotseha.Boemong ba ho qhibiliha kapa tharollo, matla a li-intermolecular a fokotseha, 'me ka mor'a hore ho pholile kapa ho qhibilihe mouoane, matla a matla a li-intermolecular a kopana, a tsosolosa thepa ea pele e tiileng.
Polyurethane thermoplastic elastomerse ka aroloa ka mefuta e 'meli: polyester le polyether, e nang le likaroloana tse tšoeu tse sa tloaelehang tsa spherical kapa columnar le boima bo lekanang ba 1.10-1.25.Mofuta oa polyether o na le letsoalo le tlase le lekanyelitsoeng ho feta mofuta oa polyester.Mocheso oa phetoho ea khalase ea mofuta oa polyether ke 100.6-106.1 ℃, 'me oa mofuta oa polyester ke 108.9-122.8 ℃.Mocheso oa brittleness oa mofuta oa polyether le mofuta oa polyester o tlase ho -62 ℃, ha mocheso o tlase oa mocheso oa mofuta o thata oa ether o molemo ho feta oa mofuta oa polyester.
Litšobotsi tse hlahelletseng tsa li-elastomer tsa polyurethane thermoplastic ke ho hanyetsa ho hoholo ho hoholo, khanyetso e ntle ea ozone, ho thatafala ho hoholo, matla a phahameng, elasticity e ntle, ho hanyetsa mocheso o tlase, ho hanyetsa oli hantle, khanyetso ea lik'hemik'hale le ho hanyetsa tikoloho.Libakeng tse mongobo, botsitso ba hydrolysis ba polyether ester bo feta hole ba mefuta ea polyester.
Li-elastomer tsa polyurethane thermoplastic ha li chefo ebile ha li na monko, li qhibiliha ka har'a metsoako e kang methyl ether, cyclohexanone, tetrahydrofuran, dioxane, le dimethylformamide, hammoho le metsoako e tsoakiloeng e entsoeng ka toluene, ethyl acetate, butanone, le acetone ka tekanyo e nepahetseng.Li bonts'a boemo bo se nang mebala le pepeneneng 'me li na le botsitso bo botle ba polokelo.
Nako ea poso: Apr-22-2024