Daim ntawv thov puas cuam tshuam rau kev ua tau zoo ntawm Polyurea tsho tshaj?
Polyureaa txheej, paub txog lawv cov khoom tiv thaiv zoo tshaj plaws, yog siv dav hauv kev tiv thaiv corrosion, kev tsim hluav taws xob, thiab lwm yam kev siv. Lawv cov qauv molecular muaj cov qauv zoo nkauj thiab cov yam ntxwv zoo rau cov yam ntxwv zoo rau cov txheej. Txawm li cas los xij, hauv cov ntawv thov kev siv, cov txheej txheem ib puag ncig lub sijhawm ntawv thov feem ntau ua qhov tseem ceeb hloov pauv cov txheej kev ua haujlwm. Yam khoom xws li qhov kub thiab txias, av noo, thiab substrate nto txwv tsis tsuas yog cuam tshuam rau kev kho cov txheej txheem tab sis kuj tau txiav txim siab ncaj qha cov khoom kawg ntawm cov txheej. Ib qho kev nkag siab meej txog kev siv daim ntawv thov ib puag ncig Polyureaa yog qhov tseem ceeb rau kev ua kom zoo thiab ua kom lub neej pabcuam kom ntev.
1. Kev tshuam ntawm kub ntawm polyrea txheej txheej ua haujlwm
Qhov kub yog qhov tseem ceeb tshaj plaws ib puag ncig cuam tshuam rau daim ntawv thov zoo ntawm polyurea tsho. Hauv qis {{-} sov qhov chaw ib puag ncig, cov kev cuam tshuam ntawm Polykeea tau txo qis, ua rau ncua sij hawm kho lub sijhawm. Qhov txwv tsis pub molecular saw nyob rau hauv cov xwm txheej no cuam tshuam tsim ntawm tus cross -}}}}}}}}}} txuas txuas rau network. Kev sim cov ntaub ntawv qhia tau tias thaum lub caij sov kub poob qis dua 10 degree, lub sijhawm kho cov txheej txheem ntau dua 50%, thiab lub zog tensile yuav poob los ntawm 30% -40%. Hloov siab, siab kub tuaj yeem kho kom nrawm tab sis kuj txhawb kev tsim cov kev tsis xws luag xws li pinholes thiab npuas, uas haum rau txheej ntom ntom ntom ntom ntom.
Cov kev hloov pauv kub kuj tseem cuam tshuam rau viscosity ntawm polyurea. Rau txhua 10℃txo qis hauv qhov kub, kwv yees rhuav tshem, ua haujlwm zoo thiab muaj peev xwm ua rau tsis sib xws thiab tsis zoo. Yog li ntawd, nws yog qhov tseem ceeb heev los tswj qhov chaw nruab nrab ntawm kev thov, nrog cov kev thov zoo ntawm 15℃thiab 35℃kom ntseeg tau cov txheej txheem zoo thiab kho tau.
2. Cov teebmeem ntawm cov av noo ntawm cov txheej zoo
Ambient cov av noo feem ntau cuam tshuam rau cov npoo zoo thiab cuam tshuam nrog cov nplaum ntawm polyuraease. Thaum txheeb ze cov av noo siab tshaj 85%, cov yeeb yaj kiab dej yog qhov yuav ua rau ntawm cov npoo av, tsim nyog hu rau ntawm cov txheej thiab substrate, uas txo cov adhesion. Kev tshawb fawb pom tias polyrea cov txheej txheem thov siv rau hauv high-}}}}}}}}}}}}}---% txo hauv adhesion lub zog.
Cov av noo kuj tseem tuaj yeem ua rau pom qhov tseeb ntawm cov txheej. Thaum lub sij hawm kho, ntau dhau noo tuaj yeem ua rau ntxuav hniav dawb los yog tsoo, tshwm sim los ntawm kev tsim cov tshuaj tiv thaiv kev cuam tshuam nrog cov lwg roj. Cov kev tsis zoo no tsis yog tsuas cuam tshuam cov tsos tab sis kuj tseem tuaj yeem ua txoj hauv kev rau cov neeg sawv cev rau cov neeg sawv cev ntawm cov txheej txheem tiv thaiv. Nws yog li pom zoo kom tswj cov vaum vaum hauv qab 85% thaum thov yog tias tsim nyog.
3. Ib puag ncig kev cuam tshuam ntawm cov xwm txheej av substrate
Cov xwm txheej ntawm substrate nto yog qhov tseem ceeb rau kev ua tiav cov nplaum muaj zog ntawm polyurea tsho, thiab ib puag ncig ncaj qha cuam tshuam nrog tus mob no. Nyob rau hauv ib puag ncig huab cua, hlau substrates yuav oxidly oxidize, thaum pob zeb ua vaj tse yuav nthuav tawm efflorescence. Ob qho tshwm sim tseem ceeb txawm tsis ncaj ncees lawm. Kev sim cov ntaub ntawv qhia tau tias nyob rau hauv 90% txheeb ze cov av noo, txheej txheem hlau tuaj yeem tsim kho 10 xyoo 5}} cov txheej txheej oxide hauv 24 teev, txo cov txheej nplaum los ntawm ntau tshaj 50%.
Lwm qhov tseem ceeb ib puag ncig parameter yog kev sib raug zoo ntawm substrate kub thiab lwg point. Yog hais tias lub substrate kub nyob hauv qab cov lwg taw qhia, hws yuav tshwm sim rau saum npoo, cuam tshuam rau cov txheej txheem zoo. Yog li ntawd, nws yog qhov tseem ceeb kom ntseeg tau tias lub substrate kub yog tsawg kawg 3℃siab dua li lwg point ua ntej thov. Cov cua sov lossis dehumidification tej zaum yuav tsim nyog. Tsis tas li ntawd, lub substrate txoj kev nyiam huv thiab kev npau suav nto yuav tsum hloov kho kom haum raws li ib puag ncig cov kev mob kom ua tiav cov adhesion.