Izindaba

Kunezinhlobo eziningi ze-organosilicon, phakathi kwazo i-silane coupling agents kanye nama-crosslinking agents afanayo. Ngokuvamile kunzima kulabo abasanda kuhlangana ne-organosilicon ukuqonda. Kuyini ukuxhumana nomehluko phakathi kwalokhu okubili?
i-ejenti yokuhlanganisa i-silane
Kuwuhlobo lwenhlanganisela ye-organic silicon equkethe izinto ezimbili zamakhemikhali ezihlukene kuma-molecule ayo, asetshenziselwa ukuthuthukisa amandla okubopha wangempela phakathi kwama-polymers nezinto ezingaphili. Lokhu kungase kubhekisele kukho kokubili ukuthuthukiswa kokunamathela kweqiniso kanye nokuthuthukiswa kokumanzi, i-rheology, nezinye izici zokusebenza. Ama-ejenti ahlanganisayo angase futhi abe nomthelela wokulungisa endaweni ye-interface ukuze kuthuthukiswe isendlalelo somngcele phakathi kwezigaba ze-organic kanye ne-inorganic.
Ngakho-ke, ama-silane coupling agents asetshenziswa kakhulu ezimbonini ezifana nokunamathiswa, okokunamathela noyinki, irabha, ukusakaza, i-fiberglass, izintambo, izindwangu, amapulasitiki, izigcwalisi, ukwelashwa kwendawo, njll.

Ama-ejenti ajwayelekile wokuhlanganisa ama-silane afaka:
Isibabule esiqukethe i-silane: bis – [3- (triethoxysilane) - propyl] – tetrasulfide, bis – [3- (triethoxysilane) - propyl] – disulfide
Aminosilane: gamma aminopropyltriethoxysilane, N – β – (aminoethyl) – gamma aminopropyltrimethoxysilane
IVinylsilane: Ethylenetriethoxysilane, Ethylenetrimethoxysilane
I-Epoxy silane: 3-glycidoxypropyltrimethoxysilane

Methacryloyloxysilane: gamma methacryloyloxypropyltrimethoxysilane, gamma methacryloyloxypropyltriisopropoxysilane

Indlela yokusebenza ye-ejenti yokuhlanganisa i-silane:
Silane crosslinking agent
I-Silane equkethe amaqembu amabili noma ngaphezulu e-silicon esebenzayo ingasebenza njenge-ejenti yokuhlanganisa phakathi kwama-molecule aqondile, ivumele ama-molecule amaningi alayini noma ama-macromolecules anegatsha elincane noma ama-polymers ukuthi abophe futhi axhumane abe isakhiwo senethiwekhi enezinhlangothi ezintathu, ekhuthaza noma elamula ukwakheka kwezibopho ezihlangene noma ze-ionic. phakathi kwamaketanga e-polymer.
I-Crosslinking agent iyingxenye eyinhloko yerabha ye-silicone yengxenye eyodwa yokushisa kwegumbi, futhi iyisisekelo sokunquma indlela yokuxhumanisa nokuqanjwa ngokwezigaba komkhiqizo.
Ngokusho kwemikhiqizo ehlukene yokusabela kwe-condensation, irabha ye-silicone ye-vulcanized yegumbi lokushisa elilodwa ingahlukaniswa ngezinhlobo ezahlukene ezifana nohlobo lwe-deacetylation, uhlobo lwe-ketoxime, uhlobo lwe-dealcoholization, uhlobo lwe-deamination, uhlobo lwe-deamidation, nohlobo lwe-deacetylation. Phakathi kwazo, izinhlobo ezintathu zokuqala ziyimikhiqizo evamile ekhiqizwa ngezinga elikhulu.

Ukuthatha i-methyltriacetoxysilane crosslinking agent njengesibonelo, ngenxa yomkhiqizo wokusabela kokujiya i-acetic acid, ibizwa ngokuthi izinga lokushisa legumbi le-deacetylated vulcanized silicone rubber.
Ngokuvamile, ama-ejenti axhumanisayo kanye nama-ejenti ahlanganisayo e-silane ahlukile, kodwa kukhona okuhlukile, njengama-alpha series silane coupling ejenti amelwe yi-phenylmethyltriethoxysilane, asetshenziswe kakhulu engxenyeni eyodwa yokushisa kwegumbi elishibhile irabha ye-silicone.

Ama-silane crosslinkers ajwayelekile afaka:

I-silane engenamanzi: i-alkyltriethoxyl, i-methyltrimethoxy
Uhlobo lwe-Deacidification Silane: triacetoxy, propyl triacetoxy silane
I-Ketoxime type silane: Vinyl tributone oxime silane, Methyl tributone oxime silane