Nnyocha na mmepe nke resin silicone dị elu.
1.1 polymer Ọdịdị, Njirimara na ngwa nke silicone resin
Silicone resin bụ ụdị nke ọkara inorganic na ọkara-organic polymer nwere - Si-O - dị ka isi yinye na n'akụkụ yinye na organic iche iche.Organosilicon resin bụ ụdị polima nwere ọtụtụ otu nọ n'ọrụ.Ndị otu ndị a na-arụ ọrụ na-aga n'ihu na-ejikọta ọnụ, ya bụ, gbanwere n'ime usoro nhazi akụkụ atọ na-agwọta ngwaahịa na-adịghị ike na nke a na-apụghị imeri emeri.
Silicone resin nwere ihe magburu onwe ya nke nguzogide dị elu na nke dị ala, ihu igwe na-eguzogide ịka nká, mmiri na-ekpuchi mmiri na mmiri, ike mkpuchi dị elu, ọnwụ dielectric dị ala, nkwụsị nke arc, nguzogide radieshon, wdg.
A na-ejikarị resin silicone ngwọta eme ihe dị ka ihe ndabere nke mkpuchi okpomọkụ, mkpuchi ihu igwe na ihe mkpuchi ọkụ eletrik dị elu.
1.2 teknụzụ teknụzụ nke resin silicone
N'ime ụdị silicone polymers niile, resin silicone bụ ụdị ngwaahịa silicone arụpụtara ma tinye ya n'oge.N'ịtụnyere mmepe ngwa ngwa nke teknụzụ ndozigharị rọba nke silicone, mmụba teknụzụ nke resin silicone na-adị nwayọ, na nnukwu ọganihu teknụzụ dị ole na ole.Ebe ọ bụ na ihe dị ka afọ 20 gara aga, n'ihi ọganihu nkà na ụzụ nke aromatic heterocyclic okpomọkụ na-eguzogide polymers, ụfọdụ n'ime ha na-eji na mbụ na ubi nke silicone resin.Agbanyeghị, nsi ihe mgbaze na ọnọdụ ọgwụgwọ siri ike nke polymers heterocyclic na-eguzogide okpomọkụ na-egbochi ngwa ha.N'afọ ndị na-adịbeghị anya, ndị mmadụ malitere ịṅa ntị na nyocha na mmepe nke resin silicone.Resin silicone nwere oke okpomọkụ dị obosara yana nguzogide ịka nká.Arụmọrụ na hydrophobic mmiri-àmà arụmọrụ dị mma na ndị ọzọ pụtara ìhè uru, e nwere ihe ịrịba ama na silicone resin nwere ike ibu ibu mmepe ohere n'ọdịnihu.
2. General silicone resin
2.1 mmepụta usoro nke izugbe silicone resin
Ụdị silicones dị iche iche nwere akụrụngwa akụrụngwa dị iche iche na ụzọ sịntetik.N'akwụkwọ a, a na-ewebata usoro mmepụta nke ọtụtụ ụdị resin silicone.
2.1.1 methyl silicone
2.2.1.1 njikọ nke methylsilicon resin sitere na methylchlorosilane
A na-ejikọta Methylsilicones na methylchlorosilane dị ka ihe bụ isi akụrụngwa.N'ihi usoro dị iche iche na ihe mejupụtara nke silicones (ogo crosslinking nke silicones, ie, [CH3] / [Si] uru), ọnọdụ njikọ dị iche iche dị mkpa.
Mgbe obere R / Si ([CH3] / [Si] ≈ 1.0) methyl silicone resin na-synthesized, hydrolysis na condensation mmeghachi omume ọsọ nke isi akụrụngwa monomers methyltrichlorosilane bụ nnọọ ngwa ngwa, na mmeghachi omume okpomọkụ ga-siri ike ịchịkwa n'ime 0 ℃. , na mmeghachi omume kwesịrị ime na ihe mgbaze ihe, na oge nchekwa nke ngwaahịa mmeghachi omume na ụlọ okpomọkụ bụ nanị ụbọchị ole na ole.Ụdị ngwaahịa a nwere ntakịrị uru bara uru.
Na njikọ nke R / Si methylsilicon resin, methyltrichlorosilane na dimethyldichlorosilane na-eji.Ọ bụ ezie na mmeghachi omume hydrolytic condensation nke ngwakọta nke methyltrichlorosilane na dimethyldichlorosilane dị ntakịrị nwayọọ karịa nke methyltrichlorosilane naanị, ọsọ mmeghachi omume hydrolytic condensation nke methyltrichlorosilane na dimethyldichlorosilane dị nnọọ iche, nke na-emekarị site na hydrolytic condensation nke methyltrichlorosilane.Hydrolyzate adịghị adabere na nha nke monomers abụọ ahụ, na methyl chlorosilane na-ejikarị hydrolyzed iji mepụta gel crosslinking mpaghara, na-ebute ihe na-adịghị mma nke resin methyl silicone nke enwetara site na hydrolysis nke monomer atọ ahụ.
2.2.1.2 njikọ nke methylsilicon sitere na methylalkoxysilane
Enwere ike ịchịkwa ọnụego mmeghachi omume nke hydrolysis condensation nke methylalkoxysilane site na mgbanwe ọnọdụ mmeghachi omume.Malite na methylalkoxysilane, methylsilicon resin nwere ogo crosslinking dị iche iche nwere ike ịmepụta.
Methylsilicones azụmahịa nwere ogo dị oke nke crosslinking ([CH3] / [Si] ≈ 1.2-1.5) na-akwadokarị site na hydrolysis na condensation nke methylalkoxysilane.A na-agwakọta monomers nke methyltriethoxysilane na dimethyldiethoxysilane a nụchara anụcha site na deacidification na mmiri, gbakwunye ya na trace hydrochloric acid ma ọ bụ ego kwesịrị ekwesị nke acid cation resin siri ike (mmetụta catalysis nke macroporous siri ike acid ion mgbanwe resin dị mma), ma dị ndụ.A na-eji ụrọ mmekọahụ (akpọnwụ mgbe acidification) mee ihe dị ka ihe na-akpali akpali, na-ekpo ọkụ na hydrolyzed.Mgbe njedebe njedebe ruru, gbakwunye hexamethyldisilazane kwesịrị ekwesị iji wepụ ihe na-akpata hydrochloric acid, ma ọ bụ yochaa resin mgbanwe ion ma ọ bụ ụrọ na-arụ ọrụ nke a na-eji dị ka ihe na-akpali akpali iji kwụsị mmeghachi omume condensation.Ngwaahịa enwetara bụ ihe ngwọta mmanya nke resin methylsilicon.
2.2.2 methyl phenyl silicone
Isi akụrụngwa maka mmepụta nke methylphenyl silicone resin bụ methyltrichlorosilane, dimethyldichlorosilane, Phenyltrichlorosilane na Diphenyldichlorosilane.A na-agbakwunye ụfọdụ monomers ma ọ bụ ihe niile dị n'elu na toluene ma ọ bụ xylene, agwakọta ya n'ụzọ kwesịrị ekwesị, tụba n'ime mmiri n'okpuru mkpasu iwe, a na-achịkwa okpomọkụ maka mmeghachi omume hydrolysis, na HCl (hydrochloric acid aqueous solution), ihe sitere na mmeghachi omume, wepụ. site na ịsacha mmiri.A na-enweta ihe ngwọta silicone nke hydrolyzed, mgbe ahụ, a na-ekpochapụ akụkụ nke ihe mgbaze ka ọ bụrụ mmanya na-egbu egbu nke silicone, mgbe ahụ, a na-edozi resin silicone site na oyi oyi ma ọ bụ mmeghachi omume okpomọkụ, na resin silicone emechara na-enweta site na nzacha na nkwakọ ngwaahịa.
2.2.3 ebumnuche izugbe methyl phenyl vinyl silicone resin na ihe ndị metụtara ya
Usoro mmepụta nke methyl phenyl vinyl silicone resin yiri nke methyl phenyl silicone resin, ma e wezụga na mgbakwunye na methyl chlorosilane na phenyl chlorosilane monomers, a na-agbakwunye ego kwesịrị ekwesị nke methyl vinyl dichlorosilane na vinyl ndị ọzọ nwere silicone monomers na hydrolysis raw. ihe.A na-asachapụ monomers agwakọta, na-asachapụ ma lekwasị anya iji nweta hydrolyzed silanol, na-agbakwunye metal organic acid salt catalyst, decompressing heat to predefined viscosity, ma ọ bụ na-achịkwa njedebe mmeghachi omume condensation dị ka oge gelation si dị, na ịkwadebe methyl phenyl vinyl silicone resin.
Methylphenyl hydropolysiloxane, nke a na-eji dị ka akụkụ nke crosslinker na mgbakwunye mmeghachi omume nke methylphenyl vinyl silicone resin, na-abụkarị mgbanaka ma ọ bụ polymer linear nwere obere ogo polymerization.A na-emepụta ha site na hydrolysis na cyclization nke methylhydrodichlorosilane, ma ọ bụ site na CO hydrolysis na condensation nke methylhydrodichlorosilane, Phenyltrichlorosilane na trimethylchlorosilane.
2.2.4 silicone gbanwere
Mmepụta nke ịgwakọta resin silicone gbanwetụrụ na resin organic na-abụkarị na toluene ma ọ bụ xylene ngwọta nke methylphenyl silicone resin, na-agbakwunye resin alkyd, resin phenolic, resin acrylic na resin organic ndị ọzọ, na-agwakọta nke ọma nke ọma iji nweta ngwaahịa emechara.
A na-akwado resin silicone nke copolymerized site na usoro mmeghachi omume kemịkal.The organic resins nwere ike copolymerized na silicone na-agụnye polyester, epoxy, phenolic, melamine formaldehyde, polyacrylate, wdg A dịgasị iche iche nke sịntetik ụzọ ga-eji kwadebe copolymerized silicone resin, ma ndị ọzọ bara uru ulo oru mmepụta usoro bụ copolymerization nke silicone mmanya na. organic resin.Nke ahụ bụ, hydrolysis nke methyl chlorosilane na phenyl chlorosilane monomers ọnụ iji nweta hydrolyzed silicon mmanya ngwọta ma ọ bụ tinye uche ngwọta, na mgbe ahụ na-agbakwunye pre synthesized organic resin prepolymer ka catalyst, mgbe ahụ ịgwakọta co okpomọkụ evaporation mgbaze, na-agbakwunye zinc, zinc naphthenate na ndị ọzọ catalysts. na mmeghachi omume cocondensation na okpomọkụ 150-170, ruo mgbe ihe mmeghachi omume ruru viscosity kwesịrị ekwesị ma ọ bụ oge gelation a kara aka, jụrụ oyi, na-agbakwunye ihe mgbaze ka igbari na nyo iji nweta ngwaahịa a rụchara nke resin silicone copolymerized.
Oge nzipu: Sep-24-2022