Ukwelapha kwe-UV ukuphulukisa kwe-ultraviolet, i-UV isifinyezo semisebe ye-UV ye-ultraviolet i-ultraviolet, ukuphulukisa kubhekisela enqubweni yokuguqula izinto zisuka kuma-molecule aphansi ziye kuma-polymer.Ukwelashwa kwe-UV ngokuvamile kubhekisela ezimweni zokuphulukisa noma izimfuneko zokunamathela (opende), oyinki, izinto zokunamathisela (iglue) noma ezinye izinto zokuvala amabhodwe ezidinga ukwelashwa ngokukhanya kwe-ultraviolet, okuhlukile ekuphulukiseni ukushisa, ukuphulukiswa kwezinamathelisi (ezelaphayo), ukwelashwa kwemvelo, njll.
Emkhakheni wama-polymers amakhemikhali, i-UV iphinde isetshenziswe njengesifinyezo sokuphulukiswa kwemisebe, i-UV, okungukuthi, ukuphulukiswa kwe-UV ultraviolet, ukusetshenziswa kwe-UV ultraviolet ukukhanya medium kanye namaza amafushane (300-800 nm) ngaphansi kwemisebe ye-UV, i-UV ewuketshezi. izinto eziku-photoinitiator ezigqugquzelwa zibe ama-radicals mahhala noma ama-cations, ngaleyo ndlela kucuphe okokusebenza kwe-polymer (i-resin) equkethe amaqembu asebenzayo e-polymerization ibe ifilimu enamathelayo engancibiliki nengancibiliki, ubuchwepheshe obusha bokuvikela imvelo kanye nokukhishwa kwe-VOC okuphansi okuvela eminyakeni yama-60s. ekhulwini lama-20.Ngemuva kweminyaka yama-80 yekhulu lama-20, iChina ithuthuke ngokushesha.
Ama-oligomers ane-viscosity ephezulu, futhi ukuze kube lula ukwakhiwa nokuthuthukisa isivinini sokuphulukisa sokuphambana, kuyadingeka ukwengeza ama-monomers njengama-diluents asebenzayo ukulungisa i-rheology ye-resin.Isakhiwo se-diluent esebenzayo sinethonya elibalulekile ezimpahleni zefilimu yokugcina yokumboza njengokugeleza, ukushelela, ukumanzisa, ukuvuvukala, ukuncipha, ukunamathela kanye nokufuduka ngaphakathi kwefilimu yokugqoka.Izihlambululi ezisebenzayo zingasebenza kanyekanye noma zisebenze kaningi, lokhu kwakamuva kube ngcono ngoba kuthuthukisa ukuxhumanisa ekwelapheni.Izidingo zokusebenza ze-diluent esebenzayo yilezi, ikhono lokuhlanjululwa, ukunyibilika, iphunga, amandla okunciphisa i-viscosity ye-medium, i-volatility, ukusebenza, ukushuba kwendawo, ukuncipha ngesikhathi se-polymerization, izinga lokushisa lokushintsha kwengilazi (Tg) ye-homopolymer, ithonya kukho konke. ukuphulukisa isivinini kanye nobuthi.I-monomer esetshenzisiwe kufanele kube i-monomer ecunula esikhumbeni futhi inani layo lingeqi ku-3 njengoba kunqunywa i-Draize.I-monomer evamile esetshenziswa njenge-diluent esebenzayo i-tripropylene glycol diacrylate (TPGDA).
Izinhlelo zokusebenza ezihlehliswayo ze-polymerization emshinini wamakhemikhali wokwelapha we-UV empeleni zifinyelelwa ngokukhiqiza ukusabela kwama-radical mahhala ngaphansi kwama-photoinitiators afanelekile kanye/noma ama-photosensitizer nezimo zokukhanyisa ezisebenza kahle kakhulu.Ama-Photoinitiators akhiqiza ama-radicals mahhala nama-cationic intermediate angasetshenziswa.Kodwa-ke, embonini yanamuhla, owokuqala uvame ukuba nombala (okungukuthi, i-photoinitiator engakhiqiza ama-radicals mahhala).
Njengamanje, amaza amaza e-ultraviolet asetshenziswa kakhulu yi-365nm, 253.7nm, 185nm, njll. Izici zifaka ukoma ngokushesha, izindleko eziphansi zokusebenza, ikhwalithi ethuthukisiwe, indawo yokugcina encishisiwe, ihlanzekile futhi isebenza kahle.Amandla esibani asetshenziswayo ngokuvamile angaphezu kuka-1000W, kusetshenziswa i-ultraviolet UVA UVC, njll., lapho i-UVC isebenzisa izibani eziningi ze-amalgam.
Isikhathi sokuthumela: Oct-19-2022