Cov tshuaj nplaum silicone tau dhau los ua thawj qhov kev xaiv ntawm cov kws tshaj lij thiab DIYers thaum nws los txog rau kev kaw ntau yam nto. Cov tshuaj nplaum silicone muaj cov khoom nplaum zoo heev thiab muaj ntau yam, muab kev ruaj khov zoo rau ntau yam kev siv. Ntawm ntau hom tshuaj nplaum silicone muag hauv khw, alkoxy silicone sealants thiab acetoxy silicone sealants yog ob hom nrov. Hauv cov xov xwm no, peb yuav saib tob txog cov yam ntxwv ntawm cov tshuaj nplaum no, lawv cov txiaj ntsig 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. Qhov sib txawv ntawm cov qauv:
Ua ntej, cia peb tshawb nrhiav qhov sib txawv ntawm cov qauv ntawm alkoxy thiab acetoxy. Ib pawg alkoxy muaj ib pawg alkyl (R-) uas txuas nrog ib lub atom oxygen (-O-). Yeej, nws yog kev sib xyaw ua ke ntawm ib pawg alkyl thiab oxygen.
Hauv lwm qhov, acetoxy yog muab los ntawm acetic acid. Nws suav nrog ib pawg acetyl (CH3CO-) sib txuas nrog ib qho oxygen 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 cov pab pawg alkoxy thiab acetoxy. Raws li pab pawg aliphatic functional, alkoxy qhia txog tus cwj pwm nucleophilic thiab qee zaum ua haujlwm ua pab pawg tawm mus. Tus cwj pwm no feem ntau nyob ntawm tus kheej thiab cov substituents ntawm pab pawg alkyl txuas nrog rau cov pa oxygen. Txij li thaum pab pawg alkoxy tsis tshua muaj zog, xav tau electrophile lossis catalyst muaj zog los pib qhov kev ua haujlwm.
Qhov sib txawv, cov pab pawg acetoxy qhia txog kev ua haujlwm sib txawv vim muaj cov pab pawg acetyl. Cov acetyl moiety thiab nws cov pa roj carbon zoo ib nrab pab txhawb rau qhov xwm txheej electrophilic ntawm pab pawg acetoxy. Yog li ntawd, pab pawg acetoxy koom nrog hauv cov tshuaj acetylation, hloov cov acetyl moiety mus rau lwm cov molecules. Cov tshuaj Acetylation yog qhov txhia chaw hauv kev tsim cov tshuaj, cov khoom ntuj thiab ntau yam organic compounds.
2. Cov khoom siv foob Alkoxy silicone: Tso tawm cov peev xwm tshiab
Cov tshuaj nplaum Alkoxy silicone yog cov tshuaj nplaum tshwj xeeb uas siv cov thev naus laus zis alkoxy curing. Cov tshuaj nplaum no paub txog lawv cov khoom sib txuas zoo heev rau ntau yam khoom siv, suav nrog iav, ceramics, thiab qee yam yas. Lawv lub peev xwm tiv tauskub siabthiabtiv taus UV hluav taws xobua rau lawv yog thawj qhov kev xaiv rau kev siv sab nraum zoov. Tsis tas li ntawd, alkoxylated silicone sealants muaj zoo heevkev tiv thaiv huab cua, xyuas kom meej tias cov txiaj ntsig kav ntev. Vim yog lawvqis modulusthiab muaj kev ywj pheej siab, lawv tuaj yeem pab txhawb kev txav mus los ntawm cov pob qij txha, ua rau lawv zoo tagnrho rau kev siv dynamic. Ib qho txiaj ntsig tseem ceeb ntawm alkoxylated silicone sealants yog lawvtsw qab tsawgthaum lub sijhawm kho, uas ua rau lawv yooj yim dua rau cov chaw kaw.
3. Cov Tshuaj Pleev Xim Acetoxy Silicone: Sim thiab Kuaj Lawm
Cov tshuaj nplaum Acetoxy silicone, ntawm qhov tod tes, vam khom cov thev naus laus zis kho acetoxy. Cov tshuaj nplaum no tau siv dav dav rau ntau xyoo lawm thiab paub txog lawv cov khoom sib khi ntau yam. Lawv tsim cov kev sib txuas zoo nrog cov ntaub ntawv siv hauv tsev feem ntau, suav nrog iav, hlau thiab ceramics. Acetoxy silicone sealants yog cov yam ntxwv los ntawmkho saithiab zoo heevtsis kam dej nooQhov kev kho sai no ua rau cov haujlwm sai thiab yooj yim. Txawm li cas los xij, nco ntsoov tias cov tshuaj nplaum acetoxy silicone tuaj yeem tso tawm cov ntxhiab tsw zoo li kua txiv hmab thaum lawv qhuav, yog li qhov cua nkag kom txaus yog qhov tseem ceeb.
4. Xaiv cov tshuaj silicone sealant uas zoo
Kev nkag siab txog cov yam ntxwv tshwj xeeb ntawm txhua hom silicone sealant yog qhov tseem ceeb rau kev txiav txim siab zoo. Cov yam ntxwv xws li lub zog sib txuas kawg, lub peev xwm sib txuas, lub sijhawm kho, kev ywj pheej, tsw thiab cov kev xav tau tshwj xeeb ntawm cov haujlwm yuav tsum tau xav txog. Qhov twg kev tiv taus UV rays, kub heev thiab huab cua sab nraum zoov yog qhov tseem ceeb, alkoxylated silicone sealants feem ntau yog qhov nyiam. Acetoxy silicone sealants muaj cov yam ntxwv kho sai thiab yog qhov kev xaiv zoo rau cov haujlwm uas xav tau lub sijhawm tig rov qab sai thiab kev sib txuas pib muaj zog. Tsis tas li ntawd, nws tsim nyog sau cia tias ob hom sealant muaj ntau yam xim, muab cov kev xaiv zoo nkauj rau cov ntawv thov uas xav tau qhov tiav zoo nkauj.
Xaus lus
Ua ke, cov tshuaj nplaum alkoxy thiab acetoxy silicone muab cov txiaj ntsig tshwj xeeb nyob ntawm qhov xav tau tshwj xeeb ntawm cov haujlwm. Qhov kev txiav txim siab zaum kawg nyob ntawm cov khoom nplaum, lub sijhawm kho, kev ywj pheej, tsw thiab cov yam ntxwv ib puag ncig. Xav txog cov ntaub ntawv tau nthuav tawm hauv xov xwm no, koj tuaj yeem xaiv cov tshuaj nplaum silicone uas haum rau koj cov kev xav tau zoo tshaj plaws.
Lub sijhawm tshaj tawm: Lub Xya Hli-26-2023