Kutheni i-silicone yolwelo ingasetyenziswa ngokubanzi kwiinkalo ezahlukeneyo?

1.Ukuqaliswa kwerabha ye-silicone engamanzi kunye nokubumba okongeziweyo

Irabha ye-silicone elulwelo kunye nokubumba okudityanisiweyo yenziwe nge-vinyl polysiloxane njengesiseko sepolymer, i-polysiloxane ene-Si-H bond njenge-arhente yokudibanisa umnqamlezo, phambi kwe-platinum catalyst, kwiqondo lokushisa okanye ukufudumeza phantsi komnqamlezo odibanisa i-vulcanization yeklasi ye-silicone. izixhobo.Ukwahlukileyo kwirubha ye-silicone elulwelo olujiyileyo, ukubumba inkqubo ye-silicone ye-vulcanization ayivelisi mveliso, i-shrinkage encinci, i-vulcanization enzulu kwaye akukho konakala kwezinto zokunxibelelana.Ineenzuzo zoluhlu olubanzi lobushushu, ukuchasana kweekhemikhali okugqwesileyo kunye nokumelana nemozulu, kwaye inokubambelela ngokulula kwiindawo ezahlukeneyo.Ngoko ke, xa kuthelekiswa ne-silicone yolwelo olujikisiweyo, uphuhliso lwe-silicone yolwelo lukhula ngokukhawuleza.Okwangoku, sele isetyenziswa ngokubanzi kwizixhobo zombane, oomatshini, ulwakhiwo, ezonyango, iimoto kunye nezinye iinkalo.

2.Amacandelo aphambili

Isiseko sePolymer

Ezi zimbini zilandelayo ze-polysiloxane ezine-vinyl zisetyenziswa njenge-polymers ezisisiseko ukongezwa kwe-silicone engamanzi.Ukusabalalisa kwabo ubunzima be-molecular kubanzi, ngokubanzi ukusuka kumawaka ukuya kwi-100,000-200,000.Isiseko se-polymer esisetyenziswa ngokuqhelekileyo kwi-silicone yolwelo elongezelelweyo yi-α,ω -divinylpolydimethylsiloxane.Kwafunyaniswa ukuba ubunzima be-molecular kunye nomxholo we-vinyl we-polymers ezisisiseko unokutshintsha iimpawu ze-silicone yamanzi.

i-arhente edibanisayo

I-agent ye-crosslinking esetyenziselwa ukongeza ukubumba i-silicone ye-liquid yi-polysiloxane ephilayo equkethe ngaphezu kwe-3 ye-Si-H ibhondi kwi-molecule, njenge-linear methyl-hydropolysiloxane equkethe iqela le-Si-H, i-ring methyl-hydropolysiloxane kunye ne-MQ resin equkethe iqela le-Si-H.Ezona zisetyenziswa ngokuqhelekileyo ziyi-linear methylhydropolysiloxane yesakhiwo esilandelayo.Kufunyaniswa ukuba iipropati ze-mechanical ze-silica gel zingatshintshwa ngokutshintsha umxholo we-hydrogen okanye isakhiwo se-agent ye-cross linking.Ifumene ukuba umxholo we-hydrogen we-agent ye-crosslinking ihambelana namandla okuqina kunye nobunzima be-silica gel.UGu Zhuojiang et al.ifunyenwe ioli ye-silicone equlethe i-hydrogen enesakhiwo esahlukileyo, ubunzima bemolekyuli eyahlukeneyo kunye nomxholo ohlukeneyo we-hydrogen ngokuguqula inkqubo yokudibanisa kunye nefomula, kwaye isetyenziswe njenge-agent edibanisayo ukudibanisa kunye nokongeza i-silicone engamanzi.

i-catalyzer

Ukuze kuphuculwe ukusebenza kakuhle kwe-catalysts, i-platinum-vinyl siloxane complexes, i-platinum-alkyne complexes kunye ne-nitrogen-modified platinum complexes zalungiswa.Ukongeza kuhlobo lwe-catalyst, ubungakanani beemveliso ze-silicone zamanzi ziya kuchaphazela nokusebenza.Ifumene ukuba ukunyusa i-concentration ye-platinum catalyst kunokukhuthaza ukusabela kwe-cross-linking phakathi kwamaqela e-methyl kunye nokuthintela ukubola kwekhonkco eliphambili.

Njengoko kukhankanyiwe ngasentla, indlela ye-vulcanization ye-silicone eyongeziweyo yolwelo lwemveli yimpendulo ye-hydrosilylation phakathi kwesiseko sepolymer equlethe i-vinyl kunye ne-polymer equlethe ibhondi ye-hydrosilylation.I-silicone yemveli yokubumba i-silicone edityanisiweyo idla ngokufuna ukubumba okuqinileyo ukwenza imveliso yokugqibela, kodwa le teknoloji yokuvelisa imveli ineziphene zeendleko eziphezulu, ixesha elide, njalo njalo.Iimveliso zihlala zingasebenzi kwiimveliso zombane.Abaphandi bafumanise ukuba uthotho lwe-silicas ezineempawu eziphezulu zinokulungiswa ngeendlela ezintsha zokunyanga kusetyenziswa i-mercaptan - i-double bond yokudibanisa i-silicas engamanzi.Iipropathi zayo ezigqwesileyo zomatshini, ukuzinza kwe-thermal kunye nokuhanjiswa kokukhanya kunokukwenza ukuba isetyenziswe kwiindawo ezintsha.Ngokusekelwe kwi-mercapto-ene bond reaction phakathi kwe-branched mercaptan functionalized polysiloxane kunye ne-vinyl yaphelisa i-polysiloxane enobunzima obuhlukeneyo be-molecular, i-silicone elastomers enobunzima obuhlengahlengiswayo kunye neepropati zomatshini zalungiswa.I-elastomers eziprintiweyo zibonisa ukulungiswa koshicilelo oluphezulu kunye neempawu ezibalaseleyo zoomatshini.Ubude be-silicone elastomers ngexesha lokuphumla bunokufikelela kwi-1400%, ephakame kakhulu kunee-elastomers zokunyanga ze-UV kwaye ziphakame ngakumbi kunezona zilula zokunyanga ii-silicone elastomers.Emva koko ii-elastomers ze-silicone ezinwebekayo kakhulu zafakwa kwii-hydrogels ezifakwe nge-carbon nanotubes ukulungiselela izixhobo zombane ezinwebekayo.I-silicone eprintwayo kunye neqhubekekayo inethuba elibanzi lokusetyenziswa kwiirobhothi ezithambileyo, ii-activators eziguquguqukayo, izifakelo zonyango kunye neminye imimandla.