Ukunyanga kwe-UV kubhekiselele ekunyangelweni kwe-UV kwinkqubo yokunyanga ngemitha (ekubhekiswa kuyo njengokunyanga kwe-UV).Itekhnoloji yokunyanga i-radiation yitekhnoloji entsha eluhlaza, ebhekisa kwinkqubo yepolymerization ekhawulezileyo kunye nokudibanisa ukunyangeka kwenkqubo yesigaba solwelo ngokukhanya kwe-ultraviolet, i-electron beam kunye ne-r-ray irradiation.Ineenzuzo zokonga amandla, ukusebenza kakuhle okuphezulu, ukusebenza kakuhle kokwambathisa, ukonga iglu, ukhuseleko kunye nokukhuselwa kwendalo, ukukhanya okuphezulu, ixesha elide, njl njl. (zombini igranite kunye nebhastile zikhona).
Iimpawu zendlela yokwakha:
I-1) Ukusebenza okugqwesileyo kokugquma: I-UV yokunyanga i-UV inokusebenza okugqwesileyo, iglosi ephezulu, ukuqina okuphezulu, kunye nokuchasana kakuhle kweekhemikhali.Ukuphucula ngokufanelekileyo umgangatho wokulungisa imingxuma yamatye.
I-2) Ukhuseleko kunye nokukhuselwa kokusingqongileyo: Ngenxa yokuba isantya sokunyanga kwe-UV sikhawuleza kakhulu, ukukhutshwa kwe-solvents ye-organic emoyeni kuyancitshiswa ukuya kwi-zero, ekhuselekileyo kunye nokusingqongileyo.
Inkqubo yomgaqo:
Iingubo ze-UV ziingubo ezinyangekayo zeUV.Emva kokuba i-UV enyangekayo yokwambathisa ifakwe kwimitha yokukhanya kwe-UV, i-photoinitiator iqala ngokufunxa amandla emitha ye-UV kwaye isebenze.Ii-electron ezikumaleko angaphandle eemolekyuli zayo ziyatsiba kwaye zivelise iziko elisebenzayo ngexesha elifutshane kakhulu.Emva koko iziko elisebenzayo lisebenza kunye namaqela angaxutywanga kwi-resin, ebangela ukuba i-double bonds kwi-resin ekhupha ukukhanya kunye ne-molecule esebenzayo ye-diluent iqhawulwe, okukhokelela kwi-reaction ye-polymerization eqhubekayo, ukwenzela ukuba idibanise ikhonkco enye kwenye ukuze yenze ifilimu.Uphononongo lweekhemikhali kinetics lubonisa ukuba indlela ye-UV yokunyanga iingubo ze-UV yipolymerization yasimahla yeradical chain.Okokuqala, isigaba sefotonitiation;Eyesibini linyathelo lokukhula kwetsheyini.Kweli nqanaba, njengoko ukukhula kwekhonkco kuqhubeka, inkqubo iya kuhlanganiswa kwaye iqiniswe ibe yifilimu;I-Z post chain radicals igqibezela ukupheliswa kwetsheyini ngokudityaniswa okanye ukungalingani.
1. Oligomer
I-Prepolymer, eyaziwa ngokuba yi-oligomer okanye i-resin, yi-skeleton yeglue ye-UV.Ngokukodwa ibhekisa kwiklasi yeepolymers zemolekyuli ezine-unsaturated double bond structure.Iphinda iphendule kwaye yenze umzimba ophilisayo odityanisiweyo emva kolwandiso, onika imathiriyeli eneempawu ezisisiseko zomzimba kunye neekhemikhali.Ngokomzekelo, i-viscosity, amandla okuqina, amandla okucheba, ubunzima kunye nokuthotyelwa.
2. Imonomer
I-monomers, ekwabizwa ngokuba yi-diluents esebenzayo, ininzi iamolekyu ezincinci eziqulethe ibhondi enye okanye ngaphezulu, ezisetyenziselwa ukulungelelanisa i-viscosity yenkqubo kwaye zithathe inxaxheba kwi-polymerization, kodwa zinefuthe kwizinga le-polymerization kunye neempawu eziphathekayo.Iimonomers zinokwahlulwa zibe ziimonomers ezisebenzayo, iimonomers ezisebenza kabini kunye neemonomers ezisebenzayo ngokwenqanaba lokusebenza.Iimonomers ze-monofunctional ziluncedo ekuphuculeni ukuguquguquka kunye nokubambelela kwe-colloid;Iimonomers ezingasebenziyo kunye neemonomers ezisebenzayo azisebenzi nje njenge-diluents, kodwa zikwasebenza njengee-agent ezidibanisayo.Zinempembelelo ebalulekileyo kubunzima, ubunzima kunye namandla.
3. Abafoti)
Iifotonitiators ziyi-intermediates ezisebenzayo ezinokuthatha i-ultraviolet okanye ukukhanya okubonakalayo kwaye zivelise i-polymerization yokuqalisa amandla ngokusebenzisa utshintsho lweekhemikhali.Ziyizinto eziphambili zenkqubo ye-photopolymerization kwaye zidlala indima ecacileyo kwi-sensitivity (izinga lokunyanga) le-UV yokunyanga inkqubo.Iifotonitiators ziquka ii-photoinitiators zamahhala kunye ne-cationic photoinitiators, ezisetyenziswa kwiinkqubo ze-radical zamahhala kunye neenkqubo ze-cationic ngokulandelanayo.
Ixesha lokuposa: Nov-24-2022