Ukwelapha kwe-UV & EB ngokuvamile kuchaza ukusetshenziswa kwe-electron beam (EB), i-ultraviolet (UV) noma ukukhanya okubonakalayo ukwenza polymerize inhlanganisela yama-monomers nama-oligomers ku-substrate. Impahla ye-UV & EB ingase yenziwe ibe uyinki, okokunamathela, okunamathelayo noma omunye umkhiqizo. Inqubo yaziwa nangokuthi ukwelapha ngemisebe noma i-radcure ngoba i-UV ne-EB ziyimithombo yamandla ekhazimulayo. Imithombo yamandla ye-UV noma ikhambi lokukhanya elibonakalayo ngokuvamile amalambu e-mercury anengcindezi emaphakathi, amalambu e-xenon acijile, ama-LED noma amalaser. I-EB–ngokungafani namaphothoni okukhanya, ajwayele ukumuncwa kakhulu endaweni yezinto—inamandla okungena ngodaka.
Izizathu Ezintathu Eziphoqayo Zokuguqula Ubuchwepheshe Be-UV & EB
Ukonga Amandla Nokukhiqiza Okuthuthukisiwe: Njengoba amasistimu amaningi engancibiliki futhi adinga isikhathi esingaphansi kwesekhondi lokuchayeka, izinzuzo zokukhiqiza zingaba zinkulu kakhulu uma ziqhathaniswa nezindlela ezivamile zokuhlanganisa. Isivinini somugqa wewebhu esingu-1,000 ft/min. zivamile futhi umkhiqizo usulungele ukuhlolwa nokuthunyelwa.
Ifanele ama-Sensitive Substrates: Amasistimu amaningi awanawo amanzi noma isincibilikisi. Ngaphezu kwalokho, le nqubo ihlinzeka ngokulawula okuphelele kwezinga lokushisa lokwelapha okwenza lilungele ukusetshenziswa kuma-substrates azwela ukushisa.
Imvelo kanye Nobungane Kubasebenzisi: Iziqalo ngokuvamile azinazo i-solvent ngakho ukukhishwa kwekhabhoni nokuvutha akuyona into ekhathazayo. Amasistimu okwelapha alula ayahambisana cishe nawo wonke amasu okusebenza futhi adinga indawo encane. Amalambu e-UV ngokuvamile angafakwa emigqeni yokukhiqiza ekhona.
Ukwakhiwa Kwelapheka kwe-UV & EB
Ama-monomers amabhlogo wokwakha alula kakhulu okwenziwa ngawo izinto zokwenziwa ze-organic. I-monomer elula etholakala ku-petroleum feed i-ethylene. Imelwe ngu: H2C=CH2. Uphawu "=" phakathi kwamayunithi amabili noma ama-athomu ekhabhoni lumelela indawo esebenzayo noma, njengoba osokhemisi bebhekisela kuyo, "isibopho esiphindwe kabili" noma ukungahlali kahle. Izingosi ezifana nalezi ezikwaziyo ukusabela ukuze zakhe izinto zamakhemikhali ezinkulu noma ezinkulu ezibizwa ngokuthi ama-oligomers nama-polymers.
I-polymer iqoqo lamayunithi amaningi (okungukuthi i-poly-) ye-monomer efanayo. Igama elithi oligomer yigama elikhethekile elisetshenziselwa ukukhomba lawo ma-polymer avame ukusabela ngokuqhubekayo ukuze akhe inhlanganisela enkulu yama-polymers. Amasayithi e-unsaturation kuma-oligomers nama-monomers kuphela ngeke abhekane nokusabela noma ukuphambana.
Endabeni yokwelashwa kwe-electron beam, ama-electron anamandla aphezulu asebenzisana ngokuqondile nama-athomu esayithi elingagcwele unsaturated ukuze akhiqize i-molecule esebenza kakhulu. Uma i-UV noma ukukhanya okubonakalayo kusetshenziswa njengomthombo wamandla, i-photoinitiator yengezwa enhlanganisweni. I-photoinitiator, lapho ivezwa ekukhanyeni, ikhiqiza i-radical yamahhala noma izenzo eziqala ukuphambana phakathi kwamasayithi angatholakali kalula.ponents ye-UV &ude
Ama-Oligomers: Izakhiwo eziphelele zanoma yikuphi ukunamathela, uyinki, okunamathelayo noma okuhlanganisayo okuxhunywe amandla akhazimulayo kunqunywa ngokuyinhloko ama-oligomers asetshenziswe ekwenziweni. Ama-Oligomers angama-polymers anesisindo samangqamuzana aphansi ngokusesilinganisweni, iningi lawo asuselwa ekukhaleni kwezakhiwo ezahlukahlukene. I-acrylation idlulisela ukungagcwalisi noma iqembu elithi “C=C” ekugcineni kwe-oligomer.
Ama-Monomers: Ama-Monomers ngokuyinhloko asetshenziswa njengezincibilikisi ukuze kwehliswe i-viscosity yezinto ezingakapheki ukuze kube lula ukusetshenziswa. Zingasebenza ngendlela eyodwa, ziqukathe iqembu elilodwa kuphela elisebenzayo noma isayithi elingathuthwanga, noma imisebenzi eminingi. Lokhu kungasebenzi kahle kuzivumela ukuthi zisabele futhi zifakwe ezintweni eziphulukisiwe noma eziqediwe, kunokuba zishise emkhathini njengoba kuvamile ngezingubo ezivamile. Ama-monomers asebenza ngokuningi, ngenxa yokuthi aqukethe amasayithi amabili noma ngaphezulu asebenzayo, enza izixhumanisi phakathi kwama-molecule e-oligomer namanye ama-monomer ekwakhiweni.
Ama-Photoinitiators: Lesi sithako sidonsa ukukhanya futhi sinesibopho sokukhiqiza ama-radicals mahhala noma izenzo. Ama-radicals amahhala noma izenzo ziyizinhlobo zamandla aphezulu ezidala ukuxhumanisa phakathi kwezindawo ezingasebenzi kahle zama-monomers, ama-oligomers nama-polymers. Ama-Photoinitiators awadingeki kumasistimu aphulukisiwe we-electron beam ngoba ama-electron ayakwazi ukuqalisa ukuphambana.
Izithasiselo: Ezivame kakhulu iziqinisi, ezivimbela ukugeleza kwe-gelation endaweni yokugcina kanye nokwelapha ngaphambi kwesikhathi ngenxa yamazinga aphansi okukhanya. Imibala enemibala, odayi, okokususa amagwebu, abagqugquzeli bokunamathela, ama-flating agents, izinto zokumanzisa kanye nezinsiza zokushelela ziyizibonelo zezinye izithasiselo.
Isikhathi sokuthumela: Jan-01-2025
