Ama-sealant e-silicone abe yisinqumo sokuqala sochwepheshe kanye nabasebenza nge-DIY uma kukhulunywa ngokufaka izinto ezihlukahlukene. Ama-sealant e-silicone anezakhiwo ezinhle kakhulu zokunamathela kanye nokuguquguquka, ahlinzeka ngokuqina okuhle kakhulu kwesikhathi eside kwezicelo ezahlukahlukene. Phakathi kwezinhlobo zama-sealant e-silicone athengiswa emakethe, ama-sealant e-alkoxy silicone kanye nama-sealant e-acetoxy silicone yizinhlobo ezimbili ezidumile. Kulezi zindaba, sizobheka ngokujulile izakhiwo zala ma-sealant, izinzuzo kanye nokubi kwawo, futhi sikusize unqume inketho engcono kakhulu yezidingo zakho ezithile.
1. Umehluko wesakhiwo:
Okokuqala, ake sihlole umehluko wesakhiwo phakathi kwe-alkoxy ne-acetoxy. Iqembu le-alkoxy lakhiwa iqembu le-alkyl (R-) elihlanganiswe ne-athomu ye-oxygen (-O-). Empeleni, liyinhlanganisela yeqembu le-alkyl ne-oxygen.
Ngakolunye uhlangothi, i-acetoxy itholakala ku-acetic acid. Ihlanganisa iqembu le-acetyl (CH3CO-) elihlanganiswe ne-athomu ye-oxygen (-O-). Ngakho-ke, i-acetoxy ingabhekwa njengeqembu le-alkyl elithathelwe indawo umoya-mpilo ngaphakathi kwengxenye ye-acetyl.
Umehluko ngesakhiwo uholela ekwehlukeni kwezakhiwo zamakhemikhali kanye nokusabela phakathi kwamaqembu e-alkoxy kanye ne-acetoxy. Njengeqembu elisebenzayo le-aliphatic, i-alkoxy ibonisa uhlamvu lwe-nucleophilic futhi kwezinye izimo isebenza njengeqembu elihambayo. Lokhu kuziphatha kuncike kakhulu ekuziboneni kanye nasezintweni ezithatha indawo yeqembu le-alkyl elixhunywe kwi-athomu ye-oxygen. Njengoba amaqembu e-alkoxy engasebenzi kahle, kudingeka i-electrophile enamandla noma i-catalyst ukuze kuqalwe ukusabela.
Ngokuphambene nalokho, amaqembu e-acetoxy abonisa ukusabela okuhlukile ngenxa yokuba khona kwamaqembu e-acetyl. I-acetyl moiety kanye ne-partial positive carbon yayo kunegalelo esimweni se-electrophilic seqembu le-acetoxy. Ngakho-ke, iqembu le-acetoxy lihlanganyela ngenkuthalo ekusabeleni kwe-acetylation, lidlulisela i-acetyl moiety kwamanye ama-molecule. Ukusabela kwe-acetylation kutholakala yonke indawo ekwakhiweni kwezidakamizwa, imikhiqizo yemvelo kanye namakhemikhali ahlukahlukene e-organic.
2. Izivalo ze-alkoxy silicone: Ukukhulula amathuba amasha
Ama-sealant e-alkoxy silicone ayizivalo ezenziwe ngokukhethekile ezisekelwe kubuchwepheshe bokuphilisa i-alkoxy. Lawa ma-sealant aziwa ngezakhiwo zawo ezinhle zokubopha ezinhlobonhlobo ze-substrates, okuhlanganisa ingilazi, izinto zobumba, kanye namapulasitiki athile. Amandla awo okumelanaamazinga okushisa aphezulufuthiukumelana nemisebe ye-UVkubenza babe ukukhetha kokuqala kokusetshenziswa kwangaphandle. Ngaphezu kwalokho, izithiyo ze-silicone ezi-alkoxylated zinhle kakhuluukumelana nesimo sezulu, ukuqinisekisa imiphumela ehlala isikhathi eside. Ngenxa yaboi-modulus ephansikanye nokuguquguquka okuphezulu, zingahambisana nokunyakaza kwamalunga, okwenza kube kuhle kakhulu ekusetshenzisweni okuguquguqukayo. Inzuzo enkulu yama-silicone sealant ahlanganisiwe yi-alkoxylatediphunga eliphansingesikhathi sokulungiswa, okwenza kube lula ukuyisebenzisa ezindaweni ezivaliwe.
3. Izivalo ze-Acetoxy Silicone: Zivivinyiwe futhi zahlolwa
Ngakolunye uhlangothi, ama-sealant e-acetoxy silicone athembele kubuchwepheshe bokuphulukisa i-acetoxy. Lawa ma-sealant asetshenziswe kakhulu amashumi eminyaka futhi aziwa ngezakhiwo zawo zokuvala eziguquguqukayo. Akha izibopho eziqinile nezinto zokwakha ezivame kakhulu, kufaka phakathi ingilazi, insimbi kanye ne-ceramics. Ama-sealant e-acetoxy silicone abonakala ngokuthiukuphulukiswa okusheshayofuthi kuhle kakhuluukumelana nomswakamaLokhu kwelashwa okusheshayo kwenza amaphrojekthi asheshe futhi abe lula. Nokho, qaphela ukuthi ama-sealant e-acetoxy silicone angakhipha iphunga elifana neleviniga njengoba ephola, ngakho-ke umoya ofanele uyadingeka.
4.Khetha i-silicone sealant efanele
Ukuqonda izakhiwo ezihlukile zohlobo ngalunye lwe-silicone sealant kubalulekile ekwenzeni isinqumo esinolwazi. Izici ezinjengokuqina kwe-bond yokugcina, ikhono lokubopha, isikhathi sokwelapha, ukuguquguquka, iphunga kanye nezidingo ezithile zephrojekthi kufanele zicatshangelwe. Lapho ukumelana nemisebe ye-UV, amazinga okushisa aphezulu kanye nesimo sezulu sangaphandle kubalulekile, ama-silicone sealant aqukethe i-alkoxylated avame ukuthandwa. Ama-silicone sealant e-Acetoxy anezici zokuqina okusheshayo futhi ayisinqumo esihle kakhulu kumaphrojekthi adinga isikhathi sokushintsha ngokushesha kanye nesibopho sokuqala esiqinile. Futhi, kubalulekile ukuqaphela ukuthi zombili izinhlobo ze-sealant zitholakala ngemibala ehlukahlukene, zinikeza izinketho zobuhle zezinhlelo zokusebenza ezidinga ukuphela okukhangayo.
Isiphetho
Ndawonye, ama-sealant e-alkoxy ne-acetoxy silicone anikeza izinzuzo ezihlukile kuye ngezidingo ezithile zephrojekthi. Isinqumo sokugcina sincike ezicini zokunamathela, isikhathi sokwelapha, ukuguquguquka, iphunga kanye nezici zemvelo. Uma ucabangela ulwazi olunikezwe kulezi zindaba, ungakhetha ngokuzethemba i-sealant ye-silicone efanelana kahle nezidingo zakho.
Isikhathi sokuthunyelwe: Julayi-26-2023