Silicone sealants tau dhau los ua thawj qhov kev xaiv ntawm cov kws tshaj lij thiab DIYers zoo ib yam thaum nws los txog rau kev sib khi ntau qhov chaw.Silicone sealants muaj cov khoom nplaum zoo thiab muaj ntau yam, muab kev ua haujlwm ntev ntev rau ntau yam kev siv.Ntawm ntau yam ntawm silicone sealants muag hauv khw, alkoxy silicone sealants thiab acetoxy silicone sealants yog ob hom nrov.Hauv cov xov xwm no, peb yuav ua tib zoo saib cov khoom ntawm cov sealants, lawv qhov zoo thiab qhov tsis zoo, thiab pab koj txiav txim siab qhov kev xaiv zoo tshaj plaws rau koj cov kev xav tau tshwj xeeb.
1. Cov qauv sib txawv:
Ua ntej, cia peb tshawb nrhiav qhov sib txawv ntawm alkoxy thiab acetoxy.Ib pawg alkoxy muaj ib pawg alkyl (R-) sib txuas rau cov pa atom (-O-).Qhov tseem ceeb, nws yog kev sib xyaw ntawm ib pawg alkyl thiab oxygen.
Hauv lwm qhov, acetoxy yog muab los ntawm acetic acid.Nws suav nrog ib pawg acetyl (CH3CO-) sib koom ua ke rau cov pa atom (-O-).Yog li, acetoxy tuaj yeem suav hais tias yog ib pawg alkyl hloov nrog oxygen hauv acetyl moiety.
Qhov sib txawv ntawm cov qauv ua rau muaj qhov sib txawv ntawm cov khoom siv tshuaj lom neeg thiab kev ua haujlwm ntawm alkoxy thiab acetoxy pawg.Raws li pab pawg ua haujlwm aliphatic, alkoxy nthuav tawm cov cim nucleophilic thiab qee zaum ua raws li pab pawg tawm.Qhov kev coj cwj pwm no feem ntau yog nyob ntawm tus kheej thiab hloov pauv ntawm pawg alkyl txuas nrog oxygen atom.Txij li cov pab pawg alkoxy tsis tshua muaj zog, muaj zog electrophile lossis catalyst yuav tsum tau pib cov tshuaj tiv thaiv.
Nyob rau hauv sib piv, acetoxy pawg pom txawv reactivity vim muaj cov acetyl pawg.Cov acetyl moiety thiab nws cov pa roj carbon zoo ib feem ua rau lub electrophilic xwm ntawm acetoxy pawg.Yog li, pawg acetoxy nquag koom nrog cov tshuaj tiv thaiv acetylation, hloov cov acetyl moiety mus rau lwm cov molecules.Cov tshuaj tiv thaiv acetylation yog ubiquitous nyob rau hauv lub synthesis ntawm tshuaj, tej yam ntuj tso khoom thiab ntau yam organic tebchaw.
2. Alkoxy silicone sealants: Unleashing tshiab possibilities
Alkoxy silicone sealants yog tshwj xeeb tsim cov sealants raws li alkoxy curing technology.Cov sealants no paub txog lawv cov khoom sib txuas zoo rau ntau yam substrates, suav nrog iav, ceramics, thiab qee yam yas.Lawv muaj peev xwm tiv tauskub kubthiabtiv thaiv UV hluav taws xobua rau lawv thawj qhov kev xaiv rau kev siv sab nraum zoov.Tsis tas li ntawd, alkoxylated silicone sealants muaj zoo heevhuab cua tsis kam, kom ntseeg tau cov txiaj ntsig ntev.Vim lawvqis modulusthiab yooj yooj yim, lawv tuaj yeem ua raws li kev sib koom ua ke, ua rau lawv zoo tagnrho rau kev siv dynamic.Ib qho txiaj ntsig tseem ceeb ntawm alkoxylated silicone sealants yog lawvqis tswthaum kho, uas ua rau lawv ntau tus neeg siv-phooj ywg nyob rau hauv qhov chaw kaw.
3.Acetoxy Silicone Sealants: Sim thiab kuaj
Acetoxy silicone sealants, ntawm qhov tod tes, cia siab rau acetoxy curing technology.Cov sealants no tau siv dav rau ntau xyoo lawm thiab paub txog lawv cov khoom sealing ntau yam.Lawv tsim kev sib raug zoo nrog cov khoom siv hauv tsev ntau tshaj plaws, suav nrog iav, hlau thiab ceramics.Acetoxy silicone sealants yog tus cwj pwm los ntawmceev khothiab zoo heevdej tsis kam.Qhov kev kho sai no ua rau cov phiaj xwm sai thiab yooj yim.Nco ntsoov, txawm li cas los xij, acetoxy silicone sealants tuaj yeem tso tawm cov ntxhiab tsw zoo li cov kua qaub thaum lawv kho, yog li qhov cua txaus yog qhov tseem ceeb.
4.Xaiv txoj cai silicone sealant
Nkag siab txog cov khoom tshwj xeeb ntawm txhua hom silicone sealant yog qhov tseem ceeb rau kev txiav txim siab paub.Cov yam ntxwv xws li qhov kawg ntawm daim ntawv cog lus lub zog, kev sib koom ua ke muaj peev xwm, kho lub sijhawm, hloov tau yooj yim, ntxhiab tsw thiab cov haujlwm tshwj xeeb yuav tsum tau txiav txim siab.Qhov twg tiv thaiv UV rays, huab cua kub thiab huab cua sab nraum zoov yog qhov tseem ceeb, alkoxylated silicone sealants feem ntau nyiam.Acetoxy silicone sealants muaj cov cuab yeej kho tau sai thiab yog qhov kev xaiv zoo tshaj plaws rau cov haujlwm uas xav tau lub sijhawm hloov pauv sai thiab muaj zog thawj zaug.Tsis tas li ntawd, nws tsim nyog sau cia tias ob hom sealant muaj nyob rau hauv ntau yam xim, muab cov kev xaiv zoo nkauj rau cov ntawv thov uas yuav tsum tau ua kom pom tseeb.
Xaus
Ua ke, alkoxy thiab acetoxy silicone sealants muab cov txiaj ntsig tshwj xeeb nyob ntawm cov phiaj xwm tshwj xeeb.Qhov kev txiav txim zaum kawg yog nyob ntawm cov khoom nplaum, kho lub sijhawm, yoog raws, tsw thiab ib puag ncig yam.Xav txog cov ntaub ntawv qhia hauv cov xov xwm no, koj tuaj yeem ntseeg siab xaiv cov silicone sealant uas zoo tshaj plaws rau koj cov kev xav tau.
Post lub sij hawm: Lub Xya hli ntuj-26-2023