Polyether-based TPU

Polyether-based TPUyog homthermoplastic polyurethane elastomer. Nws cov lus qhia lus Askiv yog raws li nram no:

### Muaj pes tsawg leeg thiab Synthesis Polyether-based TPU yog tsim los ntawm 4,4'-diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), thiab 1,4-butanediol (BDO). Ntawm lawv, MDI muab cov qauv nruj, PTMEG tsim cov ntu muag kom muaj txiaj ntsig zoo rau cov khoom siv yooj yim, thiab BDO ua raws li cov saw txuas ntxiv los ua kom cov saw hlau ntev. Cov txheej txheem synthesis yog tias MDI thiab PTMEG thawj zaug tshwm sim los ua ib qho prepolymer, thiab tom qab ntawd cov prepolymer tau txais cov saw txuas ntxiv cov tshuaj tiv thaiv nrog BDO, thiab thaum kawg, polyether-based TPU yog tsim los ntawm kev ua ntawm catalyst.

### Cov yam ntxwv zoo Cov saw hlau molecular ntawm TPU muaj ib qho (AB) n-hom block linear qauv, qhov twg A yog lub siab-molecular-yuag polyether mos ntu nrog ib qho hnyav molecular ntawm 1000-6000, B feem ntau yog butanediol, thiab cov qauv tshuaj ntawm AB chains yog diisocyanate.

### Kev Ua Tau Zoo -

**Zoo heev Hydrolysis Resistance**: Cov polyether daim ntawv cog lus (-O-) muaj ntau dua chemical stability dua polyester bond (-COO-), thiab tsis yooj yim rau lov thiab degrade nyob rau hauv ib tug dej los yog kub thiab ntub chaw. Piv txwv li, nyob rau hauv ib tug ntev lub sij hawm ntsuas ntawm 80 ° C thiab 95% txheeb ze av noo, lub tensile lub zog tuav tus nqi, ib tug polyether-raws li TPU, tshaj 85%, thiab tsis muaj ib tug pom tseeb txo nyob rau hauv lub elastic rov qab tus nqi. - **Zoo Low-Temperature Elasticity**: Cov iav hloov pauv kub (Tg) ntawm ntu polyether qis dua (feem ntau qis dua -50 ° C), uas txhais tau tiasPolyether-raws li TPUtseem tuaj yeem tswj tau zoo elasticity thiab yoog raws nyob rau hauv qhov chaw qis qis. Hauv -40 ° C ntsuas qhov ntsuas kub qis, tsis muaj qhov tshwm sim ntawm qhov tawg tawg, thiab qhov sib txawv ntawm kev ua haujlwm ntawm kev khoov los ntawm lub xeev qhov kub thiab txias yog tsawg dua 10%. - ** Zoo Tshuaj Corrosion Resistance thiab Microbial Resistance **:Polyether-based TPUmuaj qhov ua tau zoo rau feem ntau cov kuab tshuaj polar (xws li cawv, ethylene glycol, qaug zog acid thiab alkali daws), thiab yuav tsis o los yog yaj. Tsis tas li ntawd, ntu polyether tsis yooj yim decomposed los ntawm cov kab mob (xws li pwm thiab kab mob), yog li nws tuaj yeem zam kev ua haujlwm tsis zoo los ntawm microbial yaig thaum siv hauv av ntub lossis dej ib puag ncig. - ** Sib npaug Mechanical Properties**: Ua piv txwv, nws cov Shore hardness yog 85A, uas belongs rau qeb ntawm nruab nrab-siab hardness elastomers. Nws tsis tsuas yog khaws cov kev ua haujlwm siab elasticity thiab hloov tau yooj yim ntawm TPU, tab sis kuj muaj cov qauv tsim muaj zog, thiab tuaj yeem ua tiav qhov sib npaug ntawm "elastic rov qab" thiab "zoo li ruaj khov". Nws lub zog tensile tuaj yeem ncav cuag 28MPa, qhov elongation ntawm qhov tawg tshaj 500%, thiab lub zog tsim kua muag yog 60kN / m.

### Daim Ntawv Thov Fields Polyether-based TPU yog dav siv hauv thaj chaw xws li kev kho mob, tsheb, thiab sab nraum zoov. Hauv kev kho mob, nws tuaj yeem siv los ua kev kho mob catheter vim nws cov biocompatibility zoo, hydrolysis tsis kam thiab microbial tsis kam. Nyob rau hauv lub automotive teb, nws yuav siv tau rau engine compartment hoses, qhov rooj ntsaws ruaj ruaj, thiab lwm yam vim nws muaj peev xwm tiv taus kub thiab av noo ib puag ncig, tsis tshua muaj kub elasticity thiab ozone kuj. Hauv qhov chaw sab nraum zoov, nws yog qhov tsim nyog rau kev ua rau sab nraum zoov tsis muaj dej tsis zoo, nyob rau hauv qhov chaw qis qis, thiab lwm yam.