Hordhaca nuugeeyaha UV

Iftiinka qorraxdu wuxuu ka kooban yahay iftiin badan oo ultraviolet ah oo waxyeello u leh walxaha midabka leh. Mawjada dhererkeedu waa qiyaastii 290 ~ 460nm. Fallaadhahan waxyeellada leh ee ultraviolet waxay sababaan unugyada midabka si ay u jajabaan oo ay u libdhaan iyada oo loo marayo falcelinta dhimista oksaydheynta kiimikada. Isticmaalka nuugayaasha ultraviolet waxay si wax ku ool ah uga hortagi karaan ama u wiiqi karaan waxyeelada fallaadhaha ultraviolet ee walxaha la ilaaliyo.

Nuuxiyaha UV waa xasiliye iftiin kaas oo nuugi kara qaybta ultraviolet ee iftiinka qoraxda iyo ilayska fluorescent iyada oo aan is beddelin. Balaastigga iyo walxaha kale ee polymer waxay soo saaraan falcelinta auto-oxidation ee iftiinka qorraxda iyo fluorescence sababtoo ah ficilka fallaadhaha ultraviolet, taas oo horseedaysa hoos u dhaca iyo xumaanshaha polymers, iyo sii xumaanshaha muuqaalka iyo sifooyinka farsamada. Ka dib marka lagu daro nuugayaasha UV, iftiinka ultraviolet ee tamarta sare leh ayaa si xushmad leh loo nuugi karaa, isaga oo u beddelaya tamar aan waxyeello lahayn oo la sii daayo ama la isticmaalo. Sababo la xiriira noocyada kala duwan ee polymers, mawjadaha dhererka fallaadhaha ultraviolet ee sababa inay xumaadaan sidoo kale way kala duwan yihiin. Noocyada kala duwan ee UV waxay nuugi karaan shucaaca ultraviolet ee hirarka dhererka kala duwan. Marka la isticmaalayo, nuugayaasha UV waa in lagu doortaa si waafaqsan nooca polymer.

Noocyada nuuga UV

Noocyada caadiga ah ee nuugayaasha UV waxaa ka mid ah: benzotriazole (sidaQalabka UV 327benzophenone (sidaQalabka UV 531), triazine (sidaQalabka UV 1164), oo hor istaagtay amin(sidaDejinta iftiinka 622).

Nuugayaasha Benzotriazole UV ayaa hadda ah noocyada ugu badan ee laga isticmaalo Shiinaha, laakiin saamaynta codsiga ee wax-nugayaasha triazine UV ayaa aad uga wanaagsan kan benzotriazole. Nuugayaasha Triazine waxay leeyihiin sifooyin nuugista UV aad u fiican iyo faa'iidooyin kale. Waxay si ballaaran loogu isticmaali karaa polymers, waxay leeyihiin xasillooni kuleyl oo heer sare ah, xasilloonida habaynta wanaagsan, iyo caabbinta aashitada. Codsiyada wax ku oolka ah, nuugayaasha triazine UV waxay leeyihiin saameyn is dhexgalka wanaagsan oo leh xasiliyayaasha iftiinka amine-ka ee xannibay. Marka labada la isku daro, waxay leeyihiin saameyn ka wanaagsan marka loo isticmaalo keligood.

Dhawr jeer oo caadi ahaan la arko UV nuuga

(1)UV-531
budo crystalline jaale khafiif ah ama cad. Cufnaanta 1.160g/cm³ (25℃). Barta dhalaalka 48 ~ 49 ℃. Ku milma acetone, benzene, ethanol, isopropanol, wax yar ku milma dichloroethane, oo aan lagu milmin biyaha. Solubility ee dareerayaasha qaarkood (g/100g, 25 ℃) waa acetone 74, benzene 72, methanol 2, ethanol (95%) 2.6, n-heptane 40, n-hexane 40.1, biyo 0.5. Sida nuugeeyaha UV, waxay si xoog leh u nuugi kartaa iftiinka ultraviolet leh mawjada dhererkeedu yahay 270 ~ 330nm. Waxaa loo isticmaali karaa caagadaha kala duwan, gaar ahaan polyetylen, polypropylene, polystyrene, resin ABS, polycarbonate, polyvinyl chloride. Waxay leedahay iswaafajin wanaagsan oo leh resins iyo isbedel hoose. Qiyaasta guud waa 0.1% ~ 1%. Waxay leedahay saameyn isku-dhafan oo wanaagsan marka lagu isticmaalo qadar yar oo ah 4,4-thiobis (6-tert-butyl-p-cresol). Alaabtan waxa kale oo loo isticmaali karaa sidii xasiliye iftiin loogu talagalay dahaarka kala duwan.

(2)UV-327
Sida nuugeeyaha UV, astaamihiisa iyo isticmaalkiisu waxay la mid yihiin kuwa benzotriazole UV-326. Waxay si xoog leh u nuugi kartaa fallaadhaha ultraviolet leh mawjada dhererkeedu yahay 270 ~ 380nm, waxay leedahay xasillooni kiimiko oo wanaagsan iyo isbeddel aad u hooseeya. Waxay leedahay waafaqid wanaagsan oo leh polyolefins. Waxay si gaar ah ugu habboon tahay polyetylen iyo polypropylene. Intaa waxaa dheer, waxa kale oo loo isticmaali karaa chloride polyvinyl, polymethyl methacrylate, polyoxymethylene, polyurethane, polyester unsaturated, xabagta ABS, xabagta epoxy, xabagta cellulose, iwm Alaabta Tani waxay leedahay iska caabin heer sare ah si ay u sublimation kulaylka, caabbinta dhaqidda, caabbinta gaaska sii yaraanaya iyo haynta hantida farsamada. Waxay leedahay saameyn is-dhexgal oo muhiim ah marka lagu daro antioxidants. Waxaa loo isticmaalaa si loo hagaajiyo xasiloonida oksaydhka kulaylka ee alaabta.

(3)UV-9
budo crystalline jaale khafiif ah ama cad. Cufnaanta 1.324g/cm³. Barta dhalaalka 62 ~ 66 ℃. Barta karkarinta 150 ~ 160 ℃ (0.67kPa), 220℃ (2.4kPa). Ku milma inta badan dareerayaasha organic sida acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone, ethanol, laakiin aan lagu milmi karin biyaha. Solubility ee dareerayaasha qaarkood (g/100g, 25 ℃) waa dareere benzene 56.2, n-hexane 4.3, ethanol (95%) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP 18.7. Sida nuugista UV, waxay ku habboon tahay noocyo kala duwan oo caag ah sida polyvinyl chloride, chloride polyvinylidene, polymethyl methacrylate, polyester unsaturated, resin ABS, resin cellulose, iwm Waxay leedahay degenaansho kulayl wanaagsan mana ku qudhunto 200 ℃. Alaabtani si dhib leh ayey u nuugtaa iftiinka muuqda, sidaa darteed waxay ku habboon tahay alaabada hufan ee midabka iftiinka ah. Alaabtan waxa kale oo loo isticmaali karaa rinji iyo caag synthetic ah.