Silicone sealants yave sarudzo yekutanga yenyanzvi uye maDIYers zvakafanana kana zvasvika pakusunga nzvimbo dzakasiyana siyana.Silicone sealants ine yakanakisa adhesive zvimiro uye kuita kwakasiyana-siyana, ichipa yakanakisa-yakareba kusimba kweakasiyana maapplication.Pakati pemhando dzesilicone sealants dzinotengeswa mumusika, alkoxy silicone sealants uye acetoxy silicone sealants mhando mbiri dzakakurumbira.Munhau idzi, tichatarisa zvakadzama nezvezvimiro zvezvisimbiso izvi, zvakanakira nezvazvakaipira, uye tokubatsira kuona yakanakisa sarudzo yezvaunoda chaizvo.
1.Kusiyana kwemaitiro:
Kutanga, ngationgororei musiyano wezvimiro pakati pealkoxy uye acetoxy.Boka realkoxy rine boka realkyl (R-) rakasungirirwa kuatomu reokisijeni (-O-).Chaizvoizvo, isanganiswa yeboka realkyl uye oksijeni.
Mune chimwe chinhu, acetoxy inotorwa kubva kuacetic acid.Inosanganisira boka reacetyl (CH3CO-) rakasungirirwa kune atomu yeokisijeni (-O-).Nokudaro, acetoxy inogona kuonekwa seboka re alkyl rinotsiviwa neokisijeni mukati meacetyl moiety.
Musiyano wechimiro unotungamira kune misiyano yemakemikari zvivakwa uye reactivity pakati pealkoxy uye acetoxy mapoka.Seboka re aliphatic rinoshanda, alkoxy inoratidza nucleophilic hunhu uye mune dzimwe nguva inoita seboka rekusiya.Maitiro aya anonyanya kutsamira pakuzivikanwa uye zvinotsiva boka realkyl rakanamirwa neatomu reokisijeni.Sezvo mapoka e-alkoxy asina kushanda, electrophile yakasimba kana catalyst inodiwa kuti utange kuita.
Kusiyana neizvi, mapoka eacetoxy anoratidza reactivity yakasiyana nekuda kwekuvapo kweacetyl mapoka.Iyo acetyl moiety uye chikamu chayo chakanaka kabhoni chinobatsira kune electrophilic chimiro cheboka reacetoxy.Naizvozvo, boka reacetoxy rinotora chikamu mune acetylation reaction, kuendesa iyo acetyl moiety kune mamwe mamorekuru.Acetylation reactions inowanikwa kwese mukubatanidzwa kwemishonga, zvigadzirwa zvechisikigo uye akasiyana organic komisheni.
2. Alkoxy silicone sealants: Kusunungura mikana mitsva
Alkoxy silicone sealants yakanyatsogadzirwa sealants yakavakirwa pane alkoxy kurapa tekinoroji.Aya masisitimu anozivikanwa nekunaka kwekubatanidza zvivakwa kune akasiyana ma substrates, anosanganisira girazi, ceramics, uye mamwe mapurasitiki.Kugona kwavo kutsungiriratembiricha dzakakwirirauyekudzivisa UV mwaranziinovaita sarudzo yekutanga yekunze kwekushandisa.Uye zvakare, alkoxylated silicone sealants ine yakanakisaweather resistance, kuve nechokwadi chemhedzisiro inogara kwenguva refu.Nekuda kwavolow modulusuye kuchinjika kwepamusoro, vanogona kugarisa mafambiro akabatana, zvichiita kuti zvive zvakanaka kune zvine simba zvikumbiro.Kubatsira kwakakosha kwealkoxylated silicone sealants ndeyavokunhuhwirira kwakadererapanguva yekurapa, izvo zvinoita kuti vawedzere kushandiswa-mushandisi munzvimbo dzakavharwa.
3.Acetoxy Silicone Sealants: Yakaedzwa uye Yakaedzwa
Acetoxy silicone sealants, kune rumwe rutivi, vimba neacetoxy kurapa tekinoroji.Aya masisitimu ave achishandiswa zvakanyanya kwemakumi emakore uye anozivikanwa nekusiyana-siyana kwekuisa chisimbiso.Vanoumba zvisungo zvakasimba nezvinhu zvakajairika zvekuvaka, kusanganisira girazi, simbi uye ceramics.Acetoxy silicone sealants inoratidzwa nekukurumidza kuporauye yakanakakupikisa unyoro.Kurapa kwekukurumidza uku kunoita mapurojekiti nekukurumidza uye nyore.Ziva, zvisinei, kuti acetoxy silicone sealants inogona kuburitsa vhiniga-sekunhuhwirira sezvavanorapa, saka mhepo yakakwana yakakosha.
4.Sarudza yakakodzera silicone sealant
Kunzwisisa zvakasarudzika zvimiro zvega ega silicone sealant mhando yakakosha pakuita sarudzo ine ruzivo.Zvinhu zvakadai sekusimba kwechisungo chekupedzisira, kugona kwekubatanidza, nguva yekurapa, kuchinjika, kunhuwa uye zvinodiwa zveprojekiti zvese zvinofanirwa kutariswa.Iko kupokana nemwaranzi yeUV, kupisa kwakanyanya uye kunze kwekunze kwakakosha, alkoxylated silicone sealants inowanzofarirwa.Acetoxy silicone sealants inokurumidza kurapa zvivakwa uye isarudzo yakanakisa yemapurojekiti anoda kukurumidza kutendeuka nguva uye yakasimba yekutanga chisungo.Zvakare, zvakakosha kucherechedza kuti ese ari maviri sealant marudzi anowanikwa mune akasiyana siyana mavara, achipa aesthetic sarudzo yezvishandiso zvinoda kupera kunoyevedza.
Mhedziso
Pamwe chete, alkoxy uye acetoxy silicone sealants inopa mabhenefiti akasiyana zvichienderana nezvinodiwa zveprojekiti.Sarudzo yekupedzisira inoenderana nekunamira zvivakwa, nguva yekurapa, kuchinjika, kunhuwa uye zvakatipoteredza zvinhu.Tichifunga nezveruzivo rwunopihwa munhau idzi, unogona kusarudza nechivimbo silicone sealant inonyatsokodzera zvaunoda.
Nguva yekutumira: Jul-26-2023