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. Iimpawu zayo ezigqwesileyo zoomatshini, ukuzinza kwe-thermal kunye nokuhanjiswa kokukhanya kunokwenza 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%, ephezulu 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.