Hoʻokaʻawale ʻia nā ʻōnaehana vulcanization maʻamau i ʻelua mau ʻāpana nui:nā ʻōnaehana vulcanization radical peroxide a me nā ʻōnaehana vulcanization hoʻohui platinum. Eia kekahi, aia kekahi mau ʻōnaehana kūikawā ʻē aʻe. ʻO ke koho ʻana i kahi ʻōnaehana kikoʻī e pili pono i ke kaʻina hana huʻa, hana huahana, a me ke kumukūʻai.
- Pūnaehana Vulcanization Radical Peroxide
ʻO kēia ka ʻōnaehana vulcanization maʻamau a hoʻohana nui ʻia, e hoʻomaka ana i ka crosslinking o ka silicone rubber ma o nā radical manuahi i hana ʻia e ka decomposition thermal o peroxides.
Nā ʻano maʻamau o nā peroxide:
(1)2,4-Dichlorobenzoyl Peroxide (DCB):
ʻIke ʻia he keʻokeʻo a ʻeleʻele ʻeleʻele granules, pauka, a i ʻole nā paʻi. I kēia manawa, hana pinepine ʻia i loko o nā pastes a i ʻole ka hoʻopuehu ʻana me ka hoʻohana ʻana i ka aila silicon a i ʻole nā mea lawe ʻē aʻe e hoʻonui ai i ka palekana o ka hana a me ka dispersibility.
Hoʻopau maʻamau ʻo DCBP i loko o kahi ʻano wela o 90 degere a 120 degere, e lilo ia i hoʻokahi o nā peroxide organik paʻa loa. Hoʻopuka kona hoʻoheheʻe wikiwiki ʻana i nā radical manuahi e hoʻolalelale i ka hoʻopili ʻana i ke keʻa polymer{3}}, hoʻonui nui i ka pono hana a hiki i ka hoʻoemi wikiwiki ʻana. Eia nō naʻe, hoʻopuka kēia kaʻina hana i nā huahana acidic e like me ke kinoea hydrogen chloride a me 2,4-dichlorobenzoic acid, hiki ke hoʻololi i ka paʻa wela, ka insulation uila, a me ka hoʻopili ʻana i nā waiwai deformation mau loa o ka huahana hope.
ʻO Benzoyl dichloride peroxide kahi mea hoʻoheheʻe haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa. Loaʻa iā ia nā hiʻohiʻona ʻenehana ʻokoʻa a ʻo ia ka mea nui no ka silica gel foaming. Eia nō naʻe, me ka piʻi nui ʻana o nā koi no ka mālama ʻana i ke kaiapuni, palekana, a me ka hana ʻana o ka huahana, ua hoʻokūkū ʻia kona kūlana e nā ʻōnaehana vulcanization ʻoi aku ka maikaʻi a me ke kaiapuni.
(2) 
2,5-Dimethyl-2,5-bis(tert-butylperoxycyclohexane) ( DBPMH ):
ʻAno waiwai maʻamau: He pāpaʻi a wai paha (i hoʻoheheʻe pinepine ʻia me ka aila silicone, silica, a i ʻole calcium carbonate ma ke ʻano he mea lawe e hoʻomaikaʻi i ka palekana o ka hana a me ka hoʻopuehu ʻana i loko o nā pūhui kaila) mai ke keʻokeʻo a i ka melemele māmā me ka maʻemaʻe o 40% -50%. ʻAʻole loaʻa ma ke ʻano maʻemaʻe.
ʻOi aku ka kiʻekiʻe o ka mahana decomposition o bis(2,5-dimethylphenyl) sulfide (DCBP) ma mua o ka bis(2,5-dimethylphenyl) sulfide (DCBP) (~ 100 degere). Pono kēia e mālama ʻia ke kaʻina hana vulcanization/foaming ma nā wela kiʻekiʻe (maʻamau me nā mahana mold mai 165 degere a 180 degere).
ʻO nā huahana decomposition nui o DBPMH ka tert-butanol, acetone, ethane, a me ka nitrogen (mai ka mea hoʻohāhā).
ʻO kēia mau mea hoʻoheheʻe ʻia nā molekole liʻiliʻi liʻiliʻi, ʻaʻohe mea ʻawaʻawa a ʻaʻole -corrosive, no laila ʻaʻole e pōʻino i nā poni a me nā mea hana. Hoʻonui nui kēia i ke ola lawelawe o nā mold a hoʻemi i nā kumukūʻai mālama. Eia kekahi, ʻoluʻolu loa ko lākou ʻala, e hana ana i kahi kaiapuni hana hoʻonaninani e hiki ai ke hoʻokō i ka ʻala ʻole.
ʻO ka lua, ʻaʻole koi ka DCBP-vulcanized silica gel foam board i ka luaʻi vulcanization a i ʻole ka liʻiliʻi o ka lōʻihi, e hōʻemi nui ana i ka hoʻohana ikehu a me ka manawa hana.
ʻO ke kolu, ʻo ka hana ʻelua 2,5, ma ke ʻano he bifunctional peroxide (kahi e hiki ai i hoʻokahi mole ke hoʻohua i ʻelua mau radical manuahi ikaika ma ka decomposition), hiki ke hana i kahi ʻano like ʻole a me ka paʻa C-C cross{3}}network link.
ʻO ka hopena, hāʻawi ia i ka huahana me ke kūpaʻa wela ʻē aʻe, ke kūpaʻa kiʻekiʻe i ka hoʻololi ʻana i ka paʻa paʻa paʻa, a me nā waiwai kino -mechanical. Hiki i nā huahana silicone vulcanized DBPMH-ke kū'ē i -manawa lō'ihi i ka 'ike wela ma nā mahana a hiki i ka 180 degere -200 degere, 'oi aku ka maika'i o ka po'e vulcanized me DCBP.
Paʻa ka ʻupena crosslinking, a ʻoi aku ka maikaʻi o ka hana springback ma hope o ka -hoʻopiʻi lōʻihi, a ʻoi aku ka maikaʻi o nā waiwai piha e like me ka ikaika tensile a me ka ikaika o ka waimaka.
- Nā Pūnaehana Vulcanization Pākuʻi Platinum
ʻO ka platinum foaming system e hōʻike ana i ka hopena vulcanization kiʻekiʻe loa a ʻoi aku ka maikaʻi ma ke kahua o ka silicone foam. ʻAʻole ia he "mea hoʻohūhū" akā he ʻōnaehana kemika holoʻokoʻa e hoʻohana ana i nā paʻina platinum (Pt) i mea hoʻoikaika e hoʻokō i ka hoʻohui ʻana ma o ka hoʻohui ʻana i ka silane. I loko o kēia kaʻina hana, hana synergistically me nā mea hoʻoulu kino kino e hana i nā mea ʻona.
1. Kumu kumu: Pākuʻi hoʻohui, ʻaʻole radical pane
He ʻokoʻa loa i ka ʻōnaehana hoʻokaʻawale radical -recrosslinking mechanism of peroxides (e laʻa, DBPMH), ke hilinaʻi nei ka ʻōnaehana platinum-i nā hopena hoʻohui pololei. Ma lalo o ka platinum catalysis, loa'a ka ho'ohui nui o ka pū'ulu vinyl i ka ho'opa'a silane, e hana ana i nā pa'a kalapona pa'a -a me ke silikona-no ke kūkulu 'ana i kahi wīwīwī{7}}ekolu.
ʻO nā pono nui ʻehā o ka ʻōnaehana foam platinum:
ʻAʻole nā -huahana, ultra-maʻemaʻe.Me ka haʻahaʻa haʻahaʻa haʻahaʻa mea maʻiʻo, ua hoʻokō piha ia i ka ʻala a me ka leaching pono no ka hoʻopili ʻana i ka meaʻai, nā mea lapaʻau, -elepona kiʻekiʻe, a me nā kahua ʻē aʻe.
Kūʻokoʻa wela a me ka lōʻihi.Ma lalo o ke kaomi lōʻihi a i ʻole ke kūlana wela - kiʻekiʻe, hōʻike ia i ka helu hoʻihoʻi deformation kiʻekiʻe loa, e mālama ana i ka pono o ka sila a me ka hoʻokō ʻana i ka hana no nā manawa lōʻihi.
ʻO ka maikaʻi ma ke kaʻina hana palekana a me ka hoʻomalu.ʻO ke kaʻina hana vulcanization hiki ke hoʻomaluʻia, e hoʻohui i ka palekana me ka hana kiʻekiʻe.
Hiki ke hoʻomalu maikaʻi ʻia ke ʻano pore.Hiki i nā pane hoʻokuʻi maʻemaʻe a maʻemaʻe ke "laka" i ke kinoea, e hana ana i ka pore me ke kiʻekiʻe o ka paʻa -cell rate a me ka nui o ka pore like.
ʻO nā pilikia o ka Platinum Foaming Systems:
ʻO ke kumu kūʻai kiʻekiʻe loa: He kumukūʻai maoli nā catalysts Platinum, ʻoi aku ka nui o ke kumukūʻai ma mua o nā peroxides.
ʻIke loa i nā "toxins": ʻO ka nui o ka nitrogen, phosphorus, sulfur, tin, lead compound, a me kekahi mau amine organik a me nā chlorides, hiki ke "ʻawaʻawa" i nā catalysts platinum, e hoʻolilo iā lākou i mea ʻole a alakaʻi i ka sulfidation ʻole. Hoʻokomo kēia i nā koi koʻikoʻi i ka maʻemaʻe o nā mea maka, ka ʻenehana hana, a me nā mea hana.
He koʻikoʻi ka pono o ka mālama ʻana a me ka hana ʻana: Hāʻawi maʻamau ia ma ke ʻano he ʻelua-mea hoʻohuihui (mau ʻāpana A/B), pono e waiho i loko o ka pahu hau, a pono e hoʻohana ʻia i loko o ka manawa i ʻōlelo ʻia ma hope o ka hui ʻana.
- Nā ʻōnaehana vulcanization ʻē aʻe:
Pūnaehana vulcanization Ultraviolet:Hoʻohui ʻia nā Photoinitiators i ka silicone rubber, a ua hoʻokō ʻia ka hoʻōla wikiwiki ʻana ma o ka ultraviolet light irradiation. Pōmaikaʻi: Hiki iā ia ke hoʻomāliʻi koke ʻia ma ka lumi wela, ʻo ia ka mālama ʻana i ka ikehu -a maikaʻi loa. Ka palena: He palena ka mana komo i ke kukui Ultraviolet a he mea kūpono wale nō ia no nā ʻaʻahu a i ʻole nā lau a i ʻole nā pepa. No nā papa puaʻa mānoanoa, paʻakikī ke hoʻokō i ka vulcanization like ʻole a puni.
ʻO ka pulupulu silikoni paʻa vulcanized wela: Hoʻohana ʻo ia i kahi ʻōnaehana peroxide e like me ka huila silikoni hui ʻia, a hoʻoheheʻe ʻia a hoʻoulu ʻia ma hope o ka hui ʻana o loko a me ka hui ʻana. ʻO ke kaʻina hana maʻamau a kūpono no ka hana ʻana i nā huahana foamed molded o kahi mānoanoa.