Kutheni i-silicone engamanzi ingasetyenziswa kakhulu kwiinkalo ezahlukeneyo?

1.Ukwaziswa kwerabha ye-silicone engamanzi kunye nokubumba okongeziweyo

Irabha ye-silicone engamanzi enomxube owongezelelweyo yenziwe yi-vinyl polysiloxane njenge-polymer esisiseko, i-polysiloxane ene-Si-H bond njenge-arhente yokudibanisa enqamlezileyo, xa kukho i-catalyst yeplatinum, kubushushu begumbi okanye ekufudumaleni phantsi kwe-cross linking vulcanization yodidi lwezinto ze-silicone. Ngokungafaniyo nerabha ye-silicone engamanzi exineneyo, inkqubo ye-molding ye-silicone engamanzi ayivelisi iimveliso ezishiyekileyo, ukushwabana okuncinci, i-vulcanization enzulu kunye nokungabikho kokugqwala kwezinto zoqhagamshelwano. Inezibonelelo zoluhlu olubanzi lobushushu, ukumelana kweekhemikhali okugqwesileyo kunye nokumelana nemozulu, kwaye inokunamathela ngokulula kwiindawo ezahlukeneyo. Ke ngoko, xa kuthelekiswa ne-condensed liquid silicone, uphuhliso lwe-liquid silicone molding lukhawuleza. Okwangoku, isetyenziswa kakhulu kwizixhobo ze-elektroniki, oomatshini, ulwakhiwo, unyango, iimoto kunye nezinye iindawo.

2. Iinxalenye eziphambili

Isiseko sePolymer

Ezi polysiloxane zimbini zilandelayo ezine-linear ezine-vinyl zisetyenziswa njengee-base polymers zokongeza i-silicone engamanzi. Ukusasazwa kobunzima be-molecular yabo kubanzi, ngokubanzi ukusuka kumawaka ukuya kwi-100,000-200,000. Eyona polymer isetyenziswa kakhulu kwi-additive liquid silicone yi-α,ω-divinylpolydimethylsiloxane. Kufunyaniswe ukuba ubunzima be-molecular kunye nomxholo we-vinyl wee-basic polymers zinokutshintsha iipropati ze-liquid silicone.

iarhente yokudibanisa

I-arhente yokudibanisa esetyenziselwa ukongeza i-silicone yolwelo lokubumba yi-polysiloxane yendalo equlethe ngaphezulu kwe-3 Si-H bonds kwi-molecule, njenge-linear methyl-hydropolysiloxane equlathe iqela le-Si-H, i-ring methyl-hydropolysiloxane kunye ne-MQ resin equlathe iqela le-Si-H. Ezona zisetyenziswa kakhulu yi-linear methylhydropolysiloxane yesakhiwo esilandelayo. Kufunyaniswe ukuba iipropati zoomatshini ze-silica gel zinokutshintshwa ngokutshintsha umxholo we-hydrogen okanye isakhiwo se-cross linking agent. Kufumaniseke ukuba umxholo we-hydrogen we-cross linking agent uhambelana namandla okuxinana kunye nobunzima be-silica gel. UGu Zhuojiang et al. bafumana i-hydrogen-containing silicone oil enesakhiwo esahlukileyo, ubunzima beemolekyuli ezahlukeneyo kunye nomxholo we-hydrogen owahlukileyo ngokutshintsha inkqubo yokwenziwa kunye nefomula, kwaye bayisebenzisa njenge-cross linking agent yokwenza kunye nokongeza i-silicone engamanzi.

isincedisi-ndlela

Ukuze kuphuculwe ukusebenza kakuhle kwe-catalytic yee-catalysts, kwalungiswa ii-platinum-vinyl siloxane complexes, ii-platinum-alkyne complexes kunye nee-platinum complexes eziguqulwe yi-nitrogen. Ukongeza kuhlobo lwe-catalyst, ubungakanani beemveliso ze-silicone ezingamanzi buya kuchaphazela ukusebenza. Ifumanise ukuba ukwandisa uxinzelelo lwe-platinum catalyst kunokukhuthaza impendulo edibanisayo phakathi kwamaqela e-methyl kwaye kuthintele ukubola kwekhonkco eliphambili.

Njengoko kukhankanyiwe apha ngasentla, indlela yokwenza i-vulcanization ye-silicone yolwelo oludityanisiweyo yendabuko yindlela yokwenza i-hydrosilylation phakathi kwe-polymer esisiseko equlethe i-vinyl kunye ne-polymer equlethe i-hydrosilylation bond. I-silicone yolwelo yendabuko yokwenziwa kwe-silicone yolwelo idla ngokufuna i-mold eqinileyo ukwenza imveliso yokugqibela, kodwa le teknoloji yemveli yokwenziwa ineengxaki zexabiso eliphezulu, ixesha elide, njl. Iimveliso zihlala zingasebenzi kwiimveliso ze-elektroniki. Abaphandi bafumanise ukuba uthotho lwee-silicas ezineempawu eziphezulu zinokulungiswa ngeendlela ezintsha zokulungisa kusetyenziswa i-mercaptan - i-double bond addition liquid silicas. Iimpawu zayo ezintle zoomatshini, ukuzinza kobushushu kunye nokuhanjiswa kokukhanya kunokuyenza isetyenziswe kwiindawo ezintsha. Ngokusekelwe kwimpendulo ye-mercapto-ene bond phakathi kwe-branched mercaptan functionalized polysiloxane kunye ne-vinyl terminated polysiloxane enobunzima obahlukeneyo beemolekyuli, ii-silicone elastomers ezinobunzima obuhlengahlengiswayo kunye neempawu zoomatshini zalungiswa. Ii-elastomers eziprintiweyo zibonisa isisombululo esiphezulu sokuprinta kunye neempawu zoomatshini ezibalaseleyo. Ukwandiswa xa kuqhekeka ii-silicone elastomers kunokufikelela kwi-1400%, okungaphezulu kakhulu kunee-UV curing elastomers ezixeliweyo kwaye kungaphezulu nakwezona zi-silicone elastomers zinokolulwa kakhulu. Emva koko ii-silicone elastomers ezinokolulwa kakhulu zasetyenziswa kwii-hydrogels ezifakwe ii-carbon nanotubes ukulungiselela izixhobo ze-elektroniki ezinokolulwa. I-silicone eprintwayo nenokusetyenzwa inamathuba amaninzi okusetyenziswa kwiirobhothi ezithambileyo, ii-actuators eziguquguqukayo, ii-implants zonyango kunye nezinye iinkalo.