Muaj ntau ntau hom organosilicon, ntawm cov silane coupling agents thiab crosslinking agents kuj zoo ib yam. Nws feem ntau nyuaj rau cov neeg uas nyuam qhuav tuaj ntsib nrog organosilicon kom nkag siab. Qhov kev sib txuas thiab qhov sib txawv ntawm ob yog dab tsi?
silane coupling tus neeg sawv cev
Nws yog ib hom organic silicon compound uas muaj ob yam tshuaj lom neeg sib txawv hauv nws cov molecules, siv los txhim kho lub zog sib txuas ntawm cov polymers thiab cov ntaub ntawv inorganic. Qhov no yuav xa mus rau ob qho tib si kev txhim kho ntawm qhov tseeb adhesion thiab kev txhim kho ntawm wettability, rheology, thiab lwm yam kev ua haujlwm. Cov neeg ua haujlwm sib txuas kuj tseem tuaj yeem hloov kho qhov cuam tshuam rau thaj tsam cuam tshuam los txhim kho cov ciam teb ntawm cov txheej txheem organic thiab inorganic.
Yog li ntawd, silane coupling agents yog siv dav hauv kev lag luam xws li adhesives, coatings thiab inks, roj hmab, casting, fiberglass, cables, textiles, plastics, fillers, deg kho, thiab lwm yam.
Common silane coupling agents muaj xws li:
Sulfur uas muaj silane: bis - [3- (triethoxysilane) - propyl] - tetrasulfide, bis - [3- (triethoxysilane) - propyl] - disulfide
Aminosilane: gamma aminopropyltriethoxysilane, N - β - (aminoethyl) - gamma aminopropyltrimethoxysilane
Vinylsilane: Ethylenetriethoxysilane, Ethylenetrimethoxysilane
Epoxy silane: 3-glycidoxypropyltrimethoxysilane
Methacryloyloxysilane: gamma methacryloyloxypropyltrimethoxysilane, gamma methacryloyloxypropyltriisopropoxysilane
Lub mechanism ntawm kev txiav txim ntawm silane coupling tus neeg sawv cev:
Silane crosslinking tus neeg sawv cev
Silane uas muaj ob lossis ntau pawg ua haujlwm silicon tuaj yeem ua tus neeg sawv cev ntawm cov kab hluav taws xob sib txuas, tso cai rau ntau cov kab hluav taws xob lossis cov macromolecules me me los yog cov polymers rau kev sib cog lus thiab crosslink rau hauv peb-dimensional network qauv, txhawb los yog kho qhov tsim ntawm covalent lossis ionic bonds. nruab nrab ntawm cov saw hlau polymer.
Crosslinking tus neeg saib xyuas yog lub hauv paus tseem ceeb ntawm ib qho kev tivthaiv chav tsev kub vulcanized silicone roj hmab, thiab yog lub hauv paus rau kev txiav txim siab tus ntoo khaub lig-txuas mechanism thiab kev faib npe ntawm cov khoom.
Raws li cov khoom sib txawv ntawm cov tshuaj tiv thaiv condensation, ib qho kev tiv thaiv chav kub vulcanized silicone roj hmab tuaj yeem muab faib ua ntau hom xws li hom deacidification, ketoxime type, dealcoholization type, deamination type, deamidation type, thiab deacetylation type. Ntawm lawv, thawj peb hom yog cov khoom siv dav dav uas tsim los ntawm qhov loj.
Noj methyltriacetoxysilane crosslinking tus neeg sawv cev ua piv txwv, vim tias cov khoom siv tshuaj tiv thaiv condensation yog acetic acid, nws yog hu ua deacetylated chav tsev kub vulcanized silicone roj hmab.
Feem ntau hais lus, crosslinking agents thiab silane coupling agents txawv, tab sis muaj qhov tshwj xeeb, xws li alpha series silane coupling agents sawv cev los ntawm phenylmethyltriethoxysilane, uas tau siv dav hauv ib feem ntawm chav tsev kub vulcanized silicone roj hmab.
Common silane crosslinkers muaj xws li:
Lub cev qhuav dej silane: alkyltriethoxyl, methyltrimethoxy
Deacidification hom silane: triacetoxy, propyl triacetoxy silane
Ketoxime hom silane: Vinyl tributone oxime silane, Methyl tributone oxime silane
Post lub sij hawm: Lub Xya hli ntuj-15-2024