Kungani i-silicone ewuketshezi ingasetshenziswa kabanzi emikhakheni ehlukahlukene?

I-1.Ukwethulwa kwerabha ye-silicone ye-liquid ne-add molding

Irabha ye-silicone ewuketshezi enokwakheka okungeziwe yenziwe nge-vinyl polysiloxane njenge-polymer eyisisekelo, i-polysiloxane ene-Si-H bond njenge-ejenti yokuxhumanisa isiphambano, phambi kwe-platinum catalyst, ekamelweni lokushisa noma ukushisa ngaphansi kwesiphambano esixhumanisa ukuvuvuka kwekilasi le-silicone. izinto zokwakha.Ihlukile kunerabha ye-silicone ewuketshezi ejiyile, inqubo yokwenza i-silicone ye-liquid vulcanization ayikhiqizi imikhiqizo, ukuncipha okuncane, ukubola okujulile futhi akukho ukugqwala kwento yokuxhumana.Inezinzuzo zebanga lokushisa elibanzi, ukumelana namakhemikhali okuhle kakhulu kanye nokumelana nesimo sezulu, futhi inganamathela kalula ezindaweni ezahlukahlukene.Ngakho-ke, uma kuqhathaniswa ne-silicone eyi-condensed liquid, ukuthuthukiswa kokubumba kwe-silicone okuwuketshezi kuyashesha.Njengamanje, isisetshenziswa kabanzi ezintweni zikagesi, imishini, ezokwakha, ezokwelashwa, ezezimoto neminye imikhakha.

2.Izingxenye Eziyinhloko

I-Base Polymer

I-polysiloxane emibili elandelayo equkethe i-vinyl isetshenziswa njengama-polymers ayisisekelo ukuze kufakwe i-silicone ewuketshezi.Ukusabalalisa kwesisindo samangqamuzana kubanzi, ngokuvamile kusuka ezinkulungwaneni kuya ku-100,000-200,000.I-base polymer evame ukusetshenziswa kakhulu ye-additive liquid silicone i-α,ω -divinylpolydimethylsiloxane.Kwatholakala ukuthi isisindo samangqamuzana kanye nokuqukethwe kwe-vinyl kwama-polymers ayisisekelo kungashintsha izakhiwo ze-silicone ewuketshezi.

i-ejenti yokuxhumanisa

I-agent exhumanisayo esetshenziselwa ukwengeza ukubumba i-silicone ewuketshezi yi-polysiloxane ephilayo equkethe amabhondi angaphezu kuka-3 Si-H ku-molecule, njenge-methyl-hydropolysiloxane yomugqa equkethe iqembu le-Si-H, indandatho ye-methyl-hydropolysiloxane ne-MQ resin equkethe iqembu le-Si-H.Okuvame ukusetshenziswa kakhulu yi-linear methylhydropolysiloxane yesakhiwo esilandelayo.Kutholakala ukuthi izakhiwo zemishini yejeli ye-silica zingashintshwa ngokushintsha okuqukethwe kwe-hydrogen noma ukwakheka kwe-ejenti yokuxhumanisa.Ithole ukuthi okuqukethwe kwe-hydrogen ye-ejenti exhumanisayo ilingana namandla aqinile kanye nobulukhuni bejeli ye-silica.UGu Zhuojiang et al.ithole amafutha abicah aqukethe i-hydrogen anesakhiwo esihlukile, isisindo samangqamuzana ahlukene nokuqukethwe kwe-hydrogen okuhlukile ngokushintsha inqubo yokuhlanganisa nefomula, futhi yayisebenzisa njenge-ejenti exhumanisayo ukuze ihlanganise futhi yengeze i-silicone ewuketshezi.

i-catalyzer

Ukuze kuthuthukiswe ukusebenza kahle kwe-catalysts, i-platinum-vinyl siloxane complexes, i-platinum-alkyne complexes kanye ne-nitrogen-modified platinum complexes yalungiswa.Ngaphezu kohlobo lwe-catalyst, inani lemikhiqizo ye-silicone ewuketshezi izophinde ithinte ukusebenza.Ithole ukuthi ukwandisa ukugxila kwe-platinum catalyst kungakhuthaza ukusabela okuxhumanisa phakathi kwamaqembu e-methyl futhi kuvimbele ukubola kweketango eliyinhloko.

Njengoba kushiwo ngenhla, indlela yokwenza i-vulcanization ye-silicone ye-additive liquid yendabuko iwukusabela kwe-hydrosilylation phakathi kwe-base polymer equkethe i-vinyl kanye ne-polymer equkethe ibhondi ye-hydrosilylation.Ukubumba okungeziwe kwe-silicone okujwayelekile okuwuketshezi kuvame ukudinga isikhunta esiqinile ukwenza umkhiqizo wokugcina, kodwa lobu buchwepheshe bendabuko bokukhiqiza bunobubi bezindleko eziphezulu, isikhathi eside, njalo njalo.Imikhiqizo ngokuvamile ayisebenzi emikhiqizweni kagesi.Abacwaningi bathola ukuthi uchungechunge lwama-silicas anezakhiwo eziphakeme lungalungiswa ngamasu okwelapha anoveli kusetshenziswa i-mercaptan - i-double bond add silicas liquid.Izakhiwo zayo ezinhle kakhulu zemishini, ukuzinza kwe-thermal kanye nokudluliswa kokukhanya kungayenza isetshenziswe emikhakheni emisha.Ngokusekelwe ekuphenduleni kwebhondi ye-mercapto-ene phakathi kwe-branched mercaptan functionalized polysiloxane kanye ne-vinyl enqanyuliwe i-polysiloxane enesisindo samangqamuzana ahlukene, ama-silicone elastomers anobulukhuni obulungisekayo kanye nezakhiwo zemishini zalungiswa.Ama-elastomer aphrintiwe akhombisa ukulungiswa okuphezulu kokuphrinta kanye nezakhiwo ezinhle kakhulu zemishini.Ukwelulwa ngesikhathi sokuphumula kwama-silicone elastomers kungafinyelela ku-1400%, okuphakeme kakhulu kunama-elastomers okwelapha e-UV abikiwe futhi aphakeme kakhulu kunawo wonke ama-silicone elastomers alulakayo alulazekayo.Kwabe sekufakwa ama-silicone elastomers anwebeka kakhulu asetshenziswa kuma-hydrogel afakwe ama-carbon nanotubes ukuze kulungiswe izinto zikagesi ezinwebekayo.I-silicone ephrintekayo futhi ecutshungulwayo inamathemba abanzi okusebenza kumarobhothi athambile, ama-actuator avumelana nezimo, izimila zezokwelapha neminye imikhakha.