Folasaga o le UV absorber

O le susulu o le la o loʻo i ai le tele o le malamalama ultraviolet e afaina ai mea lanu. O lona galu umi e uiga i 290 ~ 460nm. O nei ave leaga o le ultraviolet e mafua ai ona pala ma mou atu mole mole lanu e ala i gaioiga faʻamaʻi faʻamaʻi-faʻaitiitia. O le faʻaogaina o le ultraviolet absorbers e mafai ona puipuia lelei pe faʻavaivaia le faʻaleagaina o ave o le ultraviolet i mea puipuia.

UV absorber o se moli faʻamautu lea e mafai ona mitiia le vaega ultraviolet o le la ma faʻapogai malamalama e aunoa ma le suia o ia lava. Palasitika ma isi mea polymer e maua ai le auto-oxidation reactions i lalo o le la ma le fluorescence ona o le gaioiga o ave ultraviolet, lea e oʻo atu ai i le faʻaleagaina ma le faʻaleagaina o polymers, ma le faʻaleagaina o foliga ma mea faʻainisinia. A maeʻa ona faʻapipiʻi UV absorbers, o lenei malamalama ultraviolet maualuga e mafai ona faʻafefeteina, liliu i le malosi le afaina ma faʻamalolo pe faʻaumatia. Ona o ituaiga eseese o polymers, o le galu o ave o le ultraviolet e mafua ai ona leaga e eseese foi. E mafai ona fa'afefete ese'ese UV fa'avevela ave ole galu eseese. A faʻaaogaina, e tatau ona filifilia UV absorbers e tusa ai ma le ituaiga polymer.

Ituaiga UV absorber

O ituaiga masani o UV mitiia e aofia ai: benzotriazole(pei oUV mitiia 327), benzophenone(pei oUV mitiia 531), triazine(pei oUV mitiia 1164), ma amine faʻalavelave (pei oFa'amautu Malamalama 622).

Benzotriazole UV absorbers o le ituaiga sili ona faʻaaogaina i Saina, ae o le faʻaogaina o le triazine UV absorbers e sili atu le lelei nai lo le benzotriazole. Triazine absorbers e sili ona lelei le faʻaaogaina o le UV ma isi mea lelei. E mafai ona faʻaaogaina lautele i polymers, e sili atu le mautu o le vevela, lelei le faʻaogaina o le gaosiga, ma le faʻamalosia o le acid. I fa'atinoga fa'atino, triazine UV absorbers ei ai se aafiaga lelei synergistic ma fa'alavelave fa'amautu malamalama amine. Pe a faʻaoga faʻatasi ia mea e lua, e sili atu ona lelei nai lo le faʻaaogaina naʻo.

Le tele o va'aiga UV e masani ona va'aia

(1)UV-531
Malamalama samasama po'o le pa'epa'e tioata tioata. Malosi 1.160g/cm³ (25 ℃). Liu liusuavai 48~49℃. Soluble i le acetone, benzene, ethanol, isopropanol, soluble teisi i le dichloroethane, le mafai ona solu i le vai. Solubility i nisi solvents (g/100g, 25 ℃) o le acetone 74, benzene 72, methanol 2, ethanol (95%) 2.6, n-heptane 40, n-hexane 40.1, vai 0.5. I le avea ai o se UV absorber, e mafai ona faʻamalosia malosi le malamalama o le ultraviolet ma le galu o le 270 ~ 330nm. E mafai ona faʻaaogaina i palasitika eseese, aemaise lava polyethylene, polypropylene, polystyrene, ABS resin, polycarbonate, polyvinyl chloride. E i ai le fetaui lelei ma resins ma maualalo volatility. Ole fua masani ole 0.1%~1%. E i ai se aafiaga lelei synergistic pe a faʻaaogaina i se vaega itiiti o le 4,4-thiobis(6-tert-butyl-p-cresol). O lenei oloa e mafai foi ona faʻaaogaina e fai ma faʻamautu malamalama mo faʻalava eseese.

(2)UV-327
I le avea ai o se UV absorber, o ona uiga ma faʻaoga e tutusa ma le benzotriazole UV-326. E mafai ona faʻafefe malosi ai ave o le ultraviolet ma le galu o le 270 ~ 380nm, e iai le mautu faʻamaʻi lelei ma le maualalo tele. E lelei le fetaui ma polyolefins. E fetaui lelei mo polyethylene ma polypropylene. E le gata i lea, e mafai foi ona faʻaaogaina mo le polyvinyl chloride, polymethyl methacrylate, polyoxymethylene, polyurethane, polyester unsaturated, resin ABS, resin epoxy, resin cellulose, ma isi mea. O lenei oloa e sili ona tetee i le vevela, faʻafefeteina, faʻafefete le kesi ma faʻamauina meatotino faʻainisinia. E iai sona aafiaga fa'atasi pe a fa'aoga fa'atasi ma antioxidants. E faʻaaogaina e faʻaleleia ai le faʻamaʻiina o le vevela o le oloa.

(3)UV-9
Malamalama samasama po'o le pa'epa'e tioata tioata. Malosi 1.324g/cm³. Liu liusuavai 62~66℃. Mea fa'apuna 150~160℃ (0.67kPa), 220℃ (2.4kPa). Soluble i le tele o so'o so'o e pei ole acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone, ethanol, ae le mafai ona solu ile vai. O le solubility i nisi solvents (g/100g, 25 ℃) solvent benzene 56.2, n-hexane 4.3, ethanol (95%) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP 18.7. I le avea ai o se UV absorber, e talafeagai mo le tele o palasitika e pei o le polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, polyester unsaturated, resin ABS, resin cellulose, ma isi. E lelei le mautu mafanafana ma e le pala ile 200℃. O lenei oloa e seasea mitiia le malamalama vaaia, o lea e talafeagai mo oloa malamalama lanu malamalama. O lenei oloa e mafai foi ona faʻaaogaina i vali ma paʻu faʻapena.