Iindaba

Kukho iintlobo ezininzi ze-organosilicon, phakathi kwazo i-silane coupling agents kunye ne-crosslinking agents zifana. Ngokuqhelekileyo kunzima kwabo basandul 'ukudibana ne-organosilicon ukuqonda. Luluphi unxibelelwano kunye nomahluko phakathi kwezi zimbini?
silane coupling agent
Luhlobo lwekhompawundi ye-silicon ye-organic equlethe iipropathi ezimbini zeekhemikhali ezahlukeneyo kwiimolekyuli zayo, ezisetyenziselwa ukuphucula amandla okwenene okudibanisa phakathi kweepolymers kunye ne-inorganic materials. Oku kunokubhekisa kukokubini ukuphuculwa kokuncamathela okwenyani kunye nokwandiswa kokumanzi, irheology, kunye nezinye iipropathi zokusebenza. Iiarhente zokudityaniswa zinokuba nempembelelo yokuguqula kwingingqi yojongano ukuze kuphuculwe umaleko womda phakathi kwezigaba eziphilayo kunye ne-inorganic.
Ke ngoko, iiarhente zokudibanisa i-silane zisetyenziswa kakhulu kumashishini anje nge-adhesives, i-coatings kunye nee-inki, irabha, ukuphosa, i-fiberglass, iintambo, amalaphu, iiplastiki, izigcwalisi, unyango olungaphezulu, njl.

Iiarhente eziqhelekileyo zokudityaniswa kwe-silane ziquka:
Isulfure equlethe i-silane: bis – [3- (triethoxysilane) - propyl] – tetrasulfide, bis – [3- (triethoxysilane) - propyl] – disulfide
Aminosilane: gamma aminopropyltriethoxysilane, N – β – (aminoethyl) – gamma aminopropyltrimethoxysilane
IVinylsilane: Ethylenetriethoxysilane, Ethylenetrimethoxysilane
Epoxy silane: 3-glycidoxypropyltrimethoxysilane

Methacryloyloxysilane: gamma methacryloyloxypropyltrimethoxysilane, gamma methacryloyloxypropyltriisopropoxysilane

Indlela yokusebenza ye-agent edibanisa i-silane:
Silane crosslinking agent
I-Silane equlethe amaqela amabini okanye ngaphezulu asebenzayo e-silicon inokusebenza njenge-arhente yokuqhawula phakathi kweemolekyuli zomgca, ivumela iimolekyuli ezininzi ezinomgca okanye i-branched macromolecules okanye iipolymers ukuba zibophe kwaye zidibanise kwisakhiwo sothungelwano esine-dimensional ezintathu, ukukhuthaza okanye ukulamla ukubunjwa kwe-covalent okanye i-ionic bonds. phakathi kwamatyathanga epolymer.
I-agent ye-Crosslinking iyona nxalenye ephambili yecandelo elilodwa lobushushu be-rubber ye-silicone ye-vulcanized, kwaye isiseko sokumisela indlela yokudibanisa kunye nokuhlelwa kwegama lemveliso.
Ngokweemveliso ezahlukeneyo zokuphendula kwe-condensation, i-rubber ye-rubber ye-silicone ye-vulcanized yegumbi elilodwa inokuthi ihlelwe kwiindidi ezahlukeneyo ezifana nohlobo lwe-deacidification, uhlobo lwe-ketoxime, uhlobo lwe-dealcoholization, uhlobo lwe-deamination, uhlobo lwe-deamidation, kunye nohlobo lwe-deacetylation. Phakathi kwazo, iintlobo ezintathu zokuqala ziyimveliso eqhelekileyo eveliswa kwinqanaba elikhulu.

Ukuthatha i-methyltriacetoxysilane crosslinking agent njengomzekelo, ngenxa ye-condensation reaction product kuba yi-acetic acid, ibizwa ngokuba yi-deacetylated room temperature vulcanized silicone rubber.
Ngokuqhelekileyo, ii-agent ezidibanisayo kunye ne-silane coupling agents zahlukile, kodwa kukho iimeko ezingaqhelekanga, ezifana ne-alpha series silane coupling agents ezimelwe yi-phenylmethyltriethoxysilane, eziye zasetyenziswa ngokubanzi kwi-single component dealcoholized room temperatures vulcanized silicone rubber.

Ii-silane crosslinkers eziqhelekileyo ziquka:

I-silane ephelelwe ngamanzi: i-alkyltriethoxyl, i-methyltrimethoxy
Uhlobo lwe-silane lwe-Deacidification: i-triacetoxy, i-propyl triacetoxy silane
Ketoxime uhlobo lwe silane: Vinyl tributone oxime silane, Methyl tributone oxime silane