Khoom npe:polyurethane

Khoom Qauv Qauv Qauv:

Tshuaj lom neeg cov khoom:

Polyurethane (PU), lub npe tag nrho lub npe ntawm polyurethane, yog cov polymer compound. Xyoo 1937 los ntawm Otto Bayer thiab lwm yam kev tsim cov khoom siv no. Muaj ob hom loj ntawm polyurethane, hom qib polyester thiab hom polyether. Lawv tuaj yeem ua rau hauv polyurethane plastics (feem ntau yog ua npuas ncauj), polyurethane fibers (hu ua spandex hauv Suav teb), Polyurethane roj hmab thiab elastomers.
Saj zawg zog polyurethane feem ntau yog cov qauv kab nrog thermoplastic, cov khoom siv tshuaj tiv thaiv zoo dua li PVC ua npuas ncauj, nrog tsawg dua kev hloov pauv hloov pauv. Nws muaj cov pa thermal zoo, lub suab rwb thaiv tsev, poob siab tsis tau, thiab cov tshuaj tiv thaiv kev lom zem thiab tiv thaiv cov tshuaj tiv thaiv lom. Yog li ntawd, nws yog siv los ua ntim, lub suab rwb thaiv tsev thiab cov ntaub ntawv lim. Rigid Polyurethane yas yog lub teeb, cov tshuaj tiv thaiv zoo tshaj, cov hluav taws xob zoo, kev ua haujlwm zoo, thiab dej tsis haum. Nws yog tsuas yog siv raws li cov khoom siv qauv rau kev tsim kho, tsheb, kev lag luam aviation thiab rwb thaiv tsev sov. Polyurethane elastomer kev ua tau zoo ntawm cov yas thiab roj hmab, cov roj ua tsis kam, cov kev tiv thaiv tsis tshua muaj, siab tawv, elasticity. Nws yog tsuas yog siv nyob rau hauv cov khau kev lag luam thiab kev lag luam kev lag luam. Polyurethane tseem tuaj yeem ua rau hauv cov nplaum, cov tawv nqaij, cov khoom siv hluavtaws, thiab lwm yam.

Daim Ntawv Thov:

Polyurethanes yog ib qho ntawm cov khoom siv ntau tshaj plaws hauv ntiaj teb niaj hnub no. Lawv cov ntau siv ntau yam los ntawm cov rooj tog hloov tau yooj yim hauv cov khoom siv kho mob thiab khau khiab, cov tshuaj nplaum, cov khoom noj khoom haus siv rau hauv cov plag tsev thiab cov khoom lag luam hauv tsheb. Polyurethanes tau siv ntau ntxiv rau hauv peb caug xyoo dhau los vim lawv muaj kev nplij siab, cov nyiaj pab tau zoo thiab muaj peev xwm txuag lub suab. Qee yam ntawm cov xwm txheej uas ua rau polyurethanes yog li ntshaw? Polyurethane durabiles ua rau muaj kev ua neej ntev ntev ntawm ntau cov khoom. Cov kev txuas ntxiv ntawm cov khoom lag luam lub neej thiab kev siv peev txheej yog ib qho kev txiav txim siab ib puag ncig uas feem ntau nyiam xaiv cov polyurethanes [19-21]. Polyurethanes (pus) sawv cev rau chav kawm tseem ceeb ntawm Thermoplastic thiab thermoset polymers raws li lawv cov tshuab, thiab tshuaj lom neeg muaj peev xwm los ntawm ntau cov tshuaj tiv thaiv ntawm ntau lub polyols thiab poly-isocyanates.