Qhov txawv ntawm TPU thiab PU yog dab tsi?

Qhov txawv ntawmTPUthiab PU?

TPU (polyurethane elastomer)

TPU (Thermoplastic Polyurethane Elastomer)yog ib hom yas tshiab. Vim nws txoj kev ua tau zoo, tiv taus huab cua, thiab tsis ua rau ib puag ncig puas tsuaj, TPU siv dav hauv kev lag luam xws li cov khoom siv khau, cov kav dej, cov yeeb yaj kiab, cov menyuam, cov xov hlau, thiab cov xov hlau.

Polyurethane thermoplastic elastomer, tseem hu ua thermoplastic polyurethane roj hmab, luv ua TPU, yog ib hom (AB) n-block linear polymer. A yog ib qho siab molecular hnyav (1000-6000) polyester lossis polyether, thiab B yog diol uas muaj 2-12 txoj saw hlau carbon atoms. Cov qauv tshuaj ntawm AB ntu yog diisocyanate, feem ntau txuas nrog los ntawm MDI.

Cov roj hmab thermoplastic polyurethane siv cov hydrogen sib txuas ntawm cov molecular lossis kev sib txuas me me ntawm cov saw hlau macromolecular, thiab ob qho kev sib txuas no tuaj yeem rov qab tau nrog qhov kub nce lossis txo qis. Hauv lub xeev molten lossis kua, cov zog intermolecular tsis muaj zog, thiab tom qab txias lossis cov kuab tshuaj evaporation, cov zog intermolecular muaj zog txuas ua ke, rov qab kho cov yam ntxwv ntawm cov khoom qub.

Cov khoom siv polyurethane thermoplastic elastomersmuaj peev xwm muab faib ua ob hom: polyester thiab polyether, nrog cov khoom dawb tsis sib xws lossis cov khoom sib dhos thiab qhov ceev ntawm 1.10-1.25. Hom polyether muaj qhov ceev qis dua li hom polyester. Qhov kub hloov iav ntawm hom polyether yog 100.6-106.1 ℃, thiab hom polyester yog 108.9-122.8 ℃. Qhov kub brittleness ntawm hom polyether thiab hom polyester qis dua -62 ℃, thaum qhov kub tsis kam ntawm hom ether nyuaj zoo dua li hom polyester.

Cov yam ntxwv zoo tshaj plaws ntawm polyurethane thermoplastic elastomers yog kev tiv taus zoo heev, tiv taus ozone zoo heev, tawv heev, muaj zog heev, elasticity zoo, tiv taus kub tsawg, tiv taus roj zoo, tiv taus tshuaj lom neeg, thiab tiv taus ib puag ncig. Hauv cov chaw noo noo, qhov ruaj khov hydrolysis ntawm polyether esters ntau dua li ntawm polyester hom.

Cov polyurethane thermoplastic elastomers tsis muaj tshuaj lom thiab tsis muaj ntxhiab, yaj tau 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 sib piv tsim nyog. Lawv qhia txog lub xeev tsis muaj xim thiab pob tshab thiab muaj kev ruaj khov zoo.