Ua lilo nā silikoni sealants i koho mua loa o nā poʻe loea a me nā DIYers i ka wā e hoʻopaʻa ai i nā ʻano ʻano like ʻole.Loaʻa i nā mea hoʻopaʻa Silicone nā waiwai adhesive maikaʻi a me ka versatility, e hāʻawi ana i ka lōʻihi lōʻihi maikaʻi loa no nā ʻano noi.Ma waena o nā ʻano o nā mea hoʻopaʻa silicone i kūʻai ʻia ma ka mākeke, ʻelua mau ʻano mea kaulana.Ma kēia nūhou, e nānā hohonu mākou i nā waiwai o kēia mau sealants, ko lākou pono a me nā pōʻino, a kōkua iā ʻoe e hoʻoholo i ka koho maikaʻi loa no kāu mau pono kikoʻī.
1. Nā ʻokoʻa ʻokoʻa:
ʻO ka mea mua, e ʻimi mākou i ka ʻokoʻa ʻokoʻa ma waena o ka alkoxy a me ka acetoxy.Aia kekahi pūʻulu alkoxy me kahi pūʻulu alkyl (R-) i hoʻopaʻa ʻia i kahi ʻātoma oxygen (-O-).ʻO ka mea nui, he hui ia o kahi hui alkyl a me ka oxygen.
Ma kahi ʻano ʻē aʻe, loaʻa ka acetoxy mai ka acetic acid.Loaʻa iā ia kahi hui acetyl (CH3CO-) i hoʻopaʻa ʻia i kahi atom oxygen (-O-).No laila, hiki ke noʻonoʻo ʻia ka acetoxy he pūʻulu alkyl i pani ʻia me ka oxygen i loko o ka acetyl moiety.
ʻO ka ʻokoʻa o ka hoʻolālā e alakaʻi i nā ʻokoʻa o nā waiwai kemika a me ka reactivity ma waena o nā hui alkoxy a me acetoxy.Ma ke ʻano he pūʻulu hana aliphatic, hōʻike ʻo alkoxy i ke ʻano nucleophilic a ma kekahi mau hana ma ke ʻano he hui haʻalele.Aia kēia ʻano i ka ʻike a me nā mea pani o ka pūʻulu alkyl i hoʻopili ʻia i ka atom oxygen.No ka mea ʻaʻole hana nā pūʻulu alkoxy, pono kahi electrophile ikaika a i ʻole catalyst e hoʻomaka i ka hopena.
ʻO ka ʻokoʻa, hōʻike nā hui acetoxy i nā ʻano hana like ʻole ma muli o ke alo o nā pūʻulu acetyl.Hāʻawi ka acetyl moiety a me kāna kalapona maikaʻi hapa i ke ʻano electrophilic o ka hui acetoxy.No laila, komo ikaika ka hui acetoxy i ka hopena acetylation, e hoʻoneʻe ana i ka acetyl moiety i nā molekala ʻē aʻe.Loaʻa nā hopena acetylation i ka synthesis o nā lāʻau lapaʻau, nā huahana kūlohelohe a me nā pūhui organik like ʻole.
2. Alkoxy silicone sealants: Hoʻokuʻu i nā mea hou
ʻO nā mea hoʻopaʻa silicone Alkoxy he mea hoʻopaʻa kūikawā i hoʻokumu ʻia i ka ʻenehana curing alkoxy.ʻIke ʻia kēia mau sealants no ko lākou mau waiwai hoʻopaʻa maikaʻi loa i nā ʻano substrates, me ke aniani, ka seramika, a me kekahi mau plastics.ʻO ko lākou hiki ke kūnā wela kiʻekiʻeapale i ka hoʻoheheʻe UVlilo lākou i koho mua no nā noi waho.Eia kekahi, ʻoi aku ka maikaʻi o nā sealants silicone alkoxylatedpale ʻana i ka wā, e hōʻoia ana i nā hopena lōʻihi.Ma muli o kā lākoumodulus haʻahaʻaa me ka hikiwawe kiʻekiʻe, hiki iā lākou ke hoʻokipa i nā neʻe hui, e hoʻolilo iā lākou i mea kūpono no nā noi ikaika.ʻO kahi pōmaikaʻi nui o nā sealants silicone alkoxylated ko lākouʻala haʻahaʻai ka wā o ka mālama ʻana, ʻoi aku ka maikaʻi o ka hoʻohana ʻana i nā wahi pani.
3.Acetoxy Silicone Sealants: Ho'āʻo a ho'āʻo
Acetoxy silicone sealants, ma ka ʻaoʻao ʻē aʻe, hilinaʻi i ka ʻenehana curing acetoxy.Ua hoʻohana nui ʻia kēia mau sealants no nā makahiki he ʻumi a ua ʻike ʻia no kā lākou mau mea hoʻopaʻa paʻa.Hoʻokumu lākou i nā paʻa paʻa me nā mea hale maʻamau, me ke aniani, ka metala a me nā seramika.Hōʻike ʻia nā sealants silicone acetoxy ehoola wikiwikia maikaʻi loapale ʻana i ka wai.ʻO kēia ho'ōla wikiwiki e wikiwiki a maʻalahi nā papahana.E makaʻala naʻe, hiki i ka acetoxy silicone sealants ke hoʻokuʻu i kahi ʻala like me ka vīnega i ko lākou hoʻōla ʻana, no laila he mea koʻikoʻi ka hoʻoulu ʻana i ka ea.
4.E koho i ka mea hoʻopaʻa silicone kūpono
ʻO ka hoʻomaopopo ʻana i nā waiwai kūʻokoʻa o kēlā me kēia ʻano sealant silicone he mea koʻikoʻi ia i ka hoʻoholo ʻana.Pono e noʻonoʻo ʻia nā mea e like me ka ikaika paʻa hope, ka hiki ke hoʻopaʻa, ka manawa hoʻōla, ka maʻalahi, ka ʻala a me nā koi o ka papahana.Ma kahi e koʻikoʻi ai ke kūʻē ʻana i nā kukuna UV, nā wela wela a me ka ʻili o waho, makemake pinepine ʻia nā mea hoʻopaʻa silicone alkoxylated.ʻO ka Acetoxy silicone sealants he mau waiwai hoʻōla wikiwiki a he koho maikaʻi loa ia no nā papahana e koi ana i ka manawa huli wikiwiki a me kahi paʻa mua ikaika.Eia kekahi, pono e hoʻomaopopo i ka loaʻa ʻana o nā ʻano sealant ʻelua i nā kala like ʻole, e hāʻawi ana i nā koho nani no nā noi e koi ana i kahi hoʻopau nani.
Ka hopena
ʻO ka hui pū, hāʻawi nā alkoxy a me acetoxy silicone sealants i nā pono kūʻokoʻa ma muli o nā koi o ka papahana.ʻO ka hoʻoholo hope loa e pili ana i nā waiwai adhesive, ka manawa hoʻōla, ka maʻalahi, ka ʻala a me nā mea kūlohelohe.Ke noʻonoʻo nei i ka ʻike i hōʻike ʻia ma kēia nūhou, hiki iā ʻoe ke koho me ka hilinaʻi i ka sealant silicone i kūpono i kāu pono.
Ka manawa hoʻouna: Iulai-26-2023