Ọgwụgwọ UV bụ ọgwụgwọ ultraviolet, UV bụ mbiri nke ultraviolet UV ụzarị ultraviolet, ọgwụgwọ na-ezo aka na usoro nke ịgbanwe ihe sitere na obere ụmụ irighiri ihe gaa na polymers.Ngwọta UV n'ozuzu na-ezo aka n'ọnọdụ ọgwụgwọ ma ọ bụ ihe achọrọ nke mkpuchi (agba), ink, adhesives (glues) ma ọ bụ ihe mkpuchi ite ndị ọzọ dị mkpa ka a gwọọ ya na ọkụ ultraviolet, nke dị iche na ọgwụgwọ kpo oku, ọgwụgwọ nke adhesives (ndị na-agwọ ọrịa), ọgwụgwọ eke, wdg.
N'ọhịa nke polymers, UV na-ejikwa dị ka mkpirisi nke ọgwụgwọ radieshon, UV, ya bụ, UV ultraviolet ọgwụgwọ, bụ ojiji nke UV ultraviolet ìhè ọkara na obere ife (300-800 nm) n'okpuru UV radieshon, mmiri mmiri UV. ihe dị na fotoinitiator kpaliri n'ime radicals ma ọ bụ cations, si otú ahụ na-akpalite ihe onwunwe polymer (resin) nke nwere otu ọrụ na-arụ ọrụ polymerization n'ime ihe nkiri mkpuchi siri ike na-adịghị edozi na nke na-adịghị agbaze, bụ nkà na ụzụ ọhụrụ nke nchebe gburugburu ebe obibi na obere VOC emissions na-apụta na 60s. nke narị afọ nke 20.Mgbe 80s nke narị afọ nke 20 gasịrị, China etolitela ngwa ngwa.
Ndị oligomers nwere nnukwu viscosity, na iji mee ka ihe owuwu dị mfe ma melite ọsọ ọsọ nke crosslinking, ọ dị mkpa ịgbakwunye monomers dị ka ihe na-emeghachi omume iji dozie rheology nke resin.Ihe owuwu nke diluent reactive nwere mmetụta dị mkpa na njirimara nke ihe nkiri mkpuchi ikpeazụ dị ka flowability, slip, wettability, ọzịza, shrinkage, adhesion na migration n'ime ihe nkiri mkpuchi.Ihe na-emeghachi omume nwere ike ịbụ monofunctional ma ọ bụ multifunctional, nke ikpeazụ na-aka mma n'ihi na ọ na-eme ka njikọ na-aga n'ihu na-agwọ ọrịa.Ihe ndị chọrọ ịrụ ọrụ maka diluent reactive bụ, ike dilution, solubility, ísì, ike ibelata viscosity nke ọkara, volatility, ọrụ, elu esemokwu, shrinkage n'oge polymerization, iko mgbanwe okpomọkụ (Tg) nke homopolymer, mmetụta na mkpokọta. na-agwọkwa ọsọ na nsi.Ihe eji eme monomer kwesịrị ịbụ monomer nke na-akpasu anụ ahụ iwe na uru ya anaghị agafe 3 dịka Draize kpebiri.Otu monomer a na-ejikarị dị ka ihe na-emeghachi omume bụ tripropylene glycol diacrylate (TPGDA).
A na-enweta ngwa ngwa mgbanwe polymerization ngwa ngwa na usoro kemịkalụ nke ọgwụgwọ UV site n'ịmepụta mmeghachi omume radical n'efu n'okpuru fotoinitiators na/ma ọ bụ fotosensitizer kwesịrị ekwesị yana ọnọdụ ọkụ na-arụ ọrụ dị elu.Enwere ike iji fotoinitiators na-emepụta radicals efu na cationic intermediates.Otú ọ dị, na ụlọ ọrụ nke oge a, nke mbụ na-abụkarị agba (ya bụ, photoinitiator nke nwere ike ịmepụta free radicals).
Ka ọ dị ugbu a, ogologo ikuku ultraviolet a na-ejikarị eme ihe bụ 365nm, 253.7nm, 185nm, wdg. Akụkụ gụnyere ihicha ozugbo, ụgwọ ọrụ dị ala, mma mma, ebe nchekwa na-ebelata, dị ọcha na nke ọma.Ike oriọna na-ejikarị karịa 1000W, na-eji ultraviolet UVA UVC, wdg, nke UVC na-eji oriọna amalgam karịa.
Oge nzipu: Ọktoba 19-2022