ʻO ka hoʻōla ʻana o UV he hoʻōla ultraviolet, ʻo UV ka pōkole o nā kukui UV ultraviolet ultraviolet, ʻo ka curing e pili ana i ke kaʻina hana o ka hoʻololi ʻana i nā mea mai nā molekele haʻahaʻa i nā polymers. ʻO ka hoʻōla ʻana o UV e pili ana i nā kūlana hoʻōla a i ʻole nā koi o ka uhi (pena), ka inika, nā adhesives (glues) a i ʻole nā potting sealants ʻē aʻe e pono e hoʻōla ʻia me ke kukui ultraviolet, he ʻokoʻa ia mai ka hoʻōla wela, hoʻōla ʻana i nā mea hoʻopili (nā lāʻau lapaʻau). lapaau maoli, etc.
Ma ke kahua o nā polymers kemika, ua hoʻohana ʻia ʻo UV e like me ka pōkole o ka radiation curing, UV, ʻo ia hoʻi, UV ultraviolet curing, ʻo ia ka hoʻohana ʻana o UV ultraviolet light medium a me ka hawewe pōkole (300-800 nm) ma lalo o UV radiation, wai UV nā mea i loko o ka photoinitiator hoʻoulu ʻia i loko o nā radical manuahi a i ʻole nā cations, a laila e hoʻoulu ai i ka polymer material (resin) i loaʻa nā pūʻulu hana hana polymerization i loko o kahi kiʻiʻoniʻoni paʻa paʻa ʻole a hoʻoheheʻe ʻole, he ʻenehana hou o ka mālama ʻana i ke kaiapuni a me nā haʻahaʻa haʻahaʻa VOC e puka mai ana i nā makahiki 60. o ke kenekulia 20. Ma hope o nā 80s o ke kenekulia 20, ua ulu wikiwiki ʻo Kina.
He viscosity kiʻekiʻe nā oligomers, a i mea e maʻalahi ai ke kūkulu ʻana a hoʻomaikaʻi i ka wikiwiki o ka hoʻōla ʻana o ka crosslinking, pono e hoʻohui i nā monomers i mea hoʻoheheʻe reactive e hoʻoponopono i ka rheology o ka resin. He mea koʻikoʻi ko ke ʻano o ka diluent reactive i nā waiwai o ke kiʻi uhi hope e like me ka flowability, slip, wettability, swelling, shrinkage, adhesion a me ka neʻe ʻana i loko o ke kiʻi uhi. Hiki i nā diluents reactive ke monofunctional a i ʻole multifunctional, ʻoi aku ka maikaʻi o ka hope no ka mea e hoʻomaikaʻi ana i ka hoʻopili ʻana i ka hoʻōla ʻana. ʻO nā koi o ka hana no ka reactive diluent, hiki i ka dilution, solubility, ʻala, hiki ke hōʻemi i ka viscosity o ka medium, volatility, functionality, surface tension, shrinkage i ka polymerization, glass transition temperature (Tg) o ka homopolymer, ka hopena i ka holoʻokoʻa. ka ho'ōla wikiwiki a me ka ʻawaʻawa. ʻO ka monomer i hoʻohanaʻia he monomer e hoʻonāukiuki i kaʻili aʻaʻole iʻoi aku kona waiwai ma mua o 3 e like me ka hoʻoholoʻana e Draize. ʻO kahi monomer maʻamau i hoʻohana ʻia e like me ka diluent reactive ʻo ia ka tripropylene glycol diacrylate (TPGDA).
Hoʻokō maoli ʻia nā noi hoʻohuli polymerization wikiwiki i ka hana kemika o ka hoʻōla ʻana o UV ma o ka hoʻopuka ʻana i nā hopena radical manuahi ma lalo o nā photoinitiators kūpono a / a i ʻole nā photosensitizers a me nā kūlana kukui kiʻekiʻe. Hiki ke hoʻohana ʻia nā photoinitiators e hoʻopuka i nā radical manuahi a me nā intermediates cationic. Eia nō naʻe, i ka ʻoihana o kēia mau lā, ʻike pinepine ʻia ka mea mua (ʻo ia hoʻi, he photoinitiator hiki ke hana i nā radical manuahi).
I kēia manawa,ʻo ka nui o nā nalu ultraviolet i hoʻohanaʻia he 365nm, 253.7nm, 185nm, a me nā mea'ē aʻe e pili ana i ka maloʻo kokeʻana, nā koina hana haʻahaʻa, ka maikaʻi o ka maikaʻi, ka hoʻemiʻana i kahi waihona, maʻemaʻe a maikaʻi. ʻOi aku ka nui o ka mana kukui ma mua o 1000W, me ka hoʻohana ʻana i ka ultraviolet UVA UVC, a me nā mea ʻē aʻe, kahi e hoʻohana ai ʻo UVC i nā kukui amalgam hou aʻe.
Ka manawa hoʻouna: ʻOkakopa-19-2022