Okwu mmalite nke UV absorber

Ìhè anyanwụ nwere ọtụtụ ìhè ultraviolet nke na-emerụ ihe ndị nwere agba. Ogologo ogologo ya dị ihe dịka 290 ~ 460nm. Ụzarị ụzarị ultraviolet ndị a na-emerụ ahụ na-eme ka ụmụ irighiri ihe na-acha agba agba ma daa site na mmeghachi omume mbelata oxidation. Ojiji nke ultraviolet absorbers nwere ike igbochi ma ọ bụ mebie mmebi nke ụzarị ultraviolet na ihe echekwara nke ọma.

UV absorber bụ ìhè stabilizer nke nwere ike banye ultraviolet akụkụ nke ìhè anyanwụ na fluorescent ìhè isi mmalite na-enweghị ịgbanwe onwe ya. Plastics na ihe ndị ọzọ polymer na-emepụta mmeghachi omume auto-oxidation n'okpuru ìhè anyanwụ na fluorescence n'ihi omume nke ụzarị ultraviolet, nke na-eduga ná mmebi na mmebi nke polymers, na mmebi nke ọdịdị na ihe eji arụ ọrụ. Mgbe agbakwunyere UV absorbers, ọkụ ọkụ ultraviolet a dị elu nwere ike itinye ya na nhọrọ, na-atụgharị ya ka ọ bụrụ ume na-adịghị emerụ ahụ ma hapụ ya ma ọ bụ rie ya. N'ihi ụdị polymers dị iche iche, ogologo oge nke ultraviolet radieshon na-eme ka ha na-akawanye njọ dịkwa iche. Ndị na-anabata UV dị iche iche nwere ike ịmịkọrọ ụzarị ultraviolet dị iche iche. Mgbe ị na-eji ya, a ga-ahọrọ ndị na-ekpo ọkụ UV dị ka ụdị polymer si dị.

Ụdị nke UV absorber

Ụdị ndị na-anabata UV na-emekarị gụnyere: benzotriazole (dịkaIhe mkpuchi UV 327benzophenone (dị kaIhe mkpuchi UV 531triazine (dị kaIhe mkpuchi UV 1164), ma gbochiri amine (dịkaỌkụ Stabilizer 622).

Benzotriazole UV absorbers bụ ugbu a ụdị ndị a na-ejikarị eme ihe na China, mana mmetụta ngwa nke triazine UV absorbers dị mma karịa nke benzotriazole. Ndị na-amịpụta Triazine nwere ezigbo nnabata UV na uru ndị ọzọ. Enwere ike iji ha mee ihe n'ọtụtụ ebe na polymers, nwee ezigbo nkwụsi ike nke okpomọkụ, nkwụsi ike nhazi dị mma, na nguzogide acid. N'ime ngwa bara uru, ndị na-etinye triazine UV nwere mmetụta synergistic dị mma yana ihe mgbochi amine ìhè stabilizers. Mgbe ejikọtara ha abụọ ọnụ, ha na-enwe mmetụta dị mma karịa mgbe ejiri naanị ha.

Ọtụtụ ihe na-anabata UV a na-ahụkarị

(1)UV-531
Ụcha kristal na-acha odo odo ma ọ bụ ọcha. Njupụta 1.160g/cm³ (25 ℃). Ebe mgbaze 48 ~ 49 ℃. Soluble na acetone, benzene, ethanol, isopropanol, ubé soluble na dichloroethane, insoluble na mmiri. Solubility na ụfọdụ ihe mgbaze (g/100g, 25 ℃) bụ acetone 74, benzene 72, methanol 2, ethanol (95%) 2.6, n-heptane 40, n-hexane 40.1, mmiri 0.5. Dị ka a UV absorber, ọ nwere ike na-enweta ike ike ultraviolet ìhè na a wavelength nke 270 ~ 330nm. Enwere ike iji ya na plastik dị iche iche, karịsịa polyethylene, polypropylene, polystyrene, resin ABS, polycarbonate, polyvinyl chloride. Ọ nwere ezigbo ndakọrịta na resins na obere volatility. Usoro ọgwụgwọ n'ozuzu bụ 0.1% ~ 1%. Ọ nwere mmetụta synergistic dị mma mgbe ejiri ya na obere 4,4-thiobis (6-tert-butyl-p-cresol). A pụkwara iji ngwaahịa a dị ka ihe nkwụnye ọkụ maka mkpuchi dị iche iche.

(2)UV-327
Dị ka onye na-ekpuchi UV, njirimara ya na ojiji ya yiri nke benzotriazole UV-326. Ọ nwere ike ịmịkọrọ ụzarị ultraviolet siri ike na ogologo ogologo nke 270 ~ 380nm, nwere ezigbo nkwụsi ike kemịkalụ yana oke ala dị ala. Ọ nwere ezigbo ndakọrịta na polyolefins. Ọ dị mma maka polyethylene na polypropylene. Ke adianade do, ọ nwekwara ike a ga-eji polyvinyl chloride, polymethyl methacrylate, polyoxymethylene, polyurethane, unsaturated polyester, ABS resin, epoxy resin, cellulose resin, wdg Ngwaahịa a nwere magburu onwe iguzogide okpomọkụ sublimation, ịsacha iguzogide, gas na-ada ada eguzogide na n'ibu onwunwe njigide. Ọ nwere mmetụta synergistic dị ịrịba ama mgbe ejiri ya na antioxidants. A na-eji ya emeziwanye nkwụsi ike oxidation thermal nke ngwaahịa.

(3)UV-9
Ụcha kristal na-acha odo odo ma ọ bụ ọcha. Njupụta 1.324g/cm³. Ebe mgbaze 62 ~ 66 ℃. Ebe esi esi 150 ~ 160 ℃ (0.67kPa), 220 ℃ (2.4kPa). Soluble n'ọtụtụ ihe mgbaze organic dị ka acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone, ethanol, mana enweghị ike ime na mmiri. Solubility na ụfọdụ ihe mgbaze (g/100g, 25 ℃) bụ ihe mgbaze benzene 56.2, n-hexane 4.3, ethanol (95%) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP 18.7. Dị ka a UV absorber, ọ bụ adabara a dịgasị iche iche nke plastik dị ka polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, ABS resin, cellulose resin, wdg Oke absorption wavelength nso bụ 280 ~ 340nm, na n'ozuzu usoro onunu ogwu ~ 1.51%. Ọ nwere ezi thermal kwụsie ike na ọ dịghị decompose na 200 ℃. Ngwaahịa a anaghị anabata ìhè a na-ahụ anya, yabụ na ọ dabara maka ngwaahịa transperent na-acha ọkụ. A pụkwara iji ngwaahịa a mee ihe na agba na roba sịntetik.

 


Oge nzipu: Mee-09-2025