Ukunyanga kwe-UV kukunyangwa kwe-ultraviolet, i-UV sisishunqulelo semitha ye-ultraviolet ye-UV ye-ultraviolet, ukunyanga kubhekisa kwinkqubo yokuguqula izinto ukusuka kwiimolekyuli ezisezantsi ukuya kwiipolymers.Ukunyangwa kwe-UV ngokubanzi kubhekiselele kwiimeko zokunyanga okanye iimfuno zokugquma (iipeyinti), ii-inki, izinto zokuncamathelisa (iiglu) okanye ezinye izinto zokutywina ezifuna ukunyangwa ngokukhanya kwe-ultraviolet, okwahlukileyo kunyango lokufudumeza, ukunyangwa kwezinto zokuncamathelisa (ii-arhente zokunyanga), unyango lwendalo, njl.
Kwintsimi yeepolymers zemichiza, i-UV ikwasetyenziswa njengesifinyezo sokunyangwa kwemitha, i-UV, oko kukuthi, ukunyangwa kwe-UV ultraviolet, kukusetyenziswa kwe-UV ultraviolet ukukhanya okuphakathi kunye namaza amafutshane (300-800 nm) phantsi kwemitha ye-UV, ulwelo lwe-UV. izinto kwifotoinitiator zivuselelwe zibe radicals simahla okanye cations, ngaloo ndlela ibangela izinto polymer (resin) equlathe amaqela asebenzayo asebenzayo polymerization ibe ifilimu enganyibilikiyo kunye non-kunyibilika ukutyabeka eqinileyo, iteknoloji entsha yokhuselo lokusingqongileyo kunye nokukhutshwa kweVOC ephantsi evela kwiminyaka engama-60. yenkulungwane yama-20.Emva kweminyaka engama-80 yenkulungwane yama-20, iChina iye yakhula ngokukhawuleza.
I-oligomers ine-viscosity ephezulu, kwaye ukwenzela ukuba kube lula ukwakhiwa kunye nokuphucula isantya sokunyanga kwe-crosslinking, kuyimfuneko yokongeza i-monomers njenge-diluents esebenzayo ukulungisa i-rheology ye-resin.Isakhiwo se-diluent esebenzayo sinempembelelo ebalulekileyo kwiipropati zefilimu yokugqibela yokugquma njengokuhamba, ukutyibilika, ukumanzisa, ukuvuvukala, ukuncipha, ukunamathela kunye nokufuduka ngaphakathi kwefilimu yokugqoka.Izinyibilikisi ezisebenzayo zinokusebenza enye okanye ezininzi, ezi zamva zingcono kuba ziphucula ukudityaniswa ekunyangeni.Iimfuno zokusebenza zedilunti esebenzayo zezi, ukukwazi ukunyibilika, ukunyibilika, ivumba, ukukwazi ukunciphisa i-viscosity ye-medium, i-volatility, ukusebenza, ukuxinezeleka komphezulu, ukucutheka ngexesha le-polymerization, iqondo lobushushu beglasi (Tg) ye-homopolymer, impembelelo kuyo yonke into. ukunyanga isantya kunye netyhefu.I-monomer esetyenzisiweyo kufuneka ibe yi-monomer ephazamisayo eluswini kwaye ixabiso layo alidluli kwi-3 njengoko kumiselwe yi-Draize.I-monomer eqhelekileyo esetyenziswa njenge-diluent esebenzayo yi-tripropylene glycol diacrylate (TPGDA).
Ukukhawuleza kwepolymerization usetyenziso olubuyisela umva kwindlela yemichiza yokunyanga i-UV ngokwenene iphunyezwa ngokuvelisa ukusabela kwe-radical simahla phantsi kweefotonitiators ezifanelekileyo kunye/okanye iifotosensitizers kunye neemeko zokukhanya eziphezulu.Iifotonitiators ezenza i-radicals yamahhala kunye ne-cationic intermediates zingasetyenziswa.Nangona kunjalo, kwishishini lanamhlanje, yangaphambili idla ngokuba nombala (oko kukuthi, i-photoinitiator enokuvelisa i-radicals yamahhala).
Okwangoku, i-ultraviolet wavelengths esetyenziswa kakhulu yi-365nm, i-253.7nm, i-185nm, njl.Amandla esibane asetyenziswayo ngokubanzi ngaphezu kwe-1000W, kusetyenziswa i-ultraviolet UVA UVC, njl., apho i-UVC isebenzisa izibane ezininzi ze-amalgam.
Ixesha lokuposa: Oct-19-2022