Dab tsi yog qhov txawv ntawmTPUthiab PU?
TPU (polyurethane elastomer)
TPU (Thermoplastic Polyurethane Elastomer)yog ib hom yas uas tawm tuaj.Vim nws txoj kev ua tau zoo, huab cua tsis kam, thiab ib puag ncig tus phooj ywg, TPU tau siv dav hauv cov khoom lag luam xws li khau ntaub, kav dej, zaj duab xis, chais, cables, thiab xov hlau.
Polyurethane thermoplastic elastomer, tseem hu ua thermoplastic polyurethane roj hmab, abbreviated li TPU, yog ib hom (AB) n-block linear polymer.A yog qhov hnyav molecular (1000-6000) polyester lossis polyether, thiab B yog diol uas muaj 2-12 ncaj saw carbon atoms.Cov qauv tshuaj ntawm AB ntu yog diisocyanate, feem ntau txuas nrog MDI.
Thermoplastic polyurethane roj hmab cia siab rau kev sib txuas ntawm cov hydrogen sib txuas los yog sib txuas me me ntawm cov saw hlau macromolecular, thiab ob qho kev sib txuas sib txuas yog thim rov qab nrog nce lossis txo qhov kub.Nyob rau hauv lub xeev molten los yog tov, lub zog intermolecular tsis muaj zog, thiab tom qab txias los yog hnyav evaporation, muaj zog intermolecular rog txuas ua ke, rov ua kom cov khoom ntawm cov khoom qub.
Polyurethane thermoplastic elastomersmuaj peev xwm muab faib ua ob hom: polyester thiab polyether, nrog dawb tsis xwm yeem kheej kheej kheej kheej lossis columnar hais thiab tus txheeb ze ntom ntom ntawm 1.10-1.25.Hom polyether muaj qhov sib txheeb tsawg dua li hom polyester.Cov iav hloov pauv kub ntawm polyether hom yog 100.6-106.1 ℃, thiab polyester hom yog 108.9-122.8 ℃.Lub brittleness kub ntawm polyether hom thiab polyester hom yog qis dua -62 ℃, thaum lub kub tsis kam ntawm hard ether hom yog zoo dua li ntawm polyester hom.
Cov yam ntxwv zoo ntawm polyurethane thermoplastic elastomers yog zoo heev hnav tsis kam, zoo heev ozone kuj, siab hardness, siab zog, zoo elasticity, tsis kub tsis kam, zoo roj kuj, tshuaj tsis kam, thiab ib puag ncig kuj.Hauv qhov chaw ntub dej, qhov kev ruaj ntseg hydrolysis ntawm polyether esters deb tshaj li ntawm polyester hom.
Polyurethane thermoplastic elastomers tsis muaj tshuaj lom thiab tsis muaj ntxhiab, soluble hauv cov kuab tshuaj xws li methyl ether, cyclohexanone, tetrahydrofuran, dioxane, thiab dimethylformamide, nrog rau cov kuab tshuaj sib xyaw ua ke ntawm toluene, ethyl acetate, butanone, thiab acetone hauv qhov tsim nyog.Lawv nthuav tawm lub xeev tsis muaj xim thiab pob tshab thiab muaj kev ruaj ntseg zoo.
Post lub sij hawm: Apr-22-2024