Intshayelelo ye-UV absorber

Ukukhanya kwelanga kuqulathe ukukhanya okuninzi kwe-ultraviolet okuyingozi kwizinto ezinemibala. Ubude bayo obude bumalunga ne-290 ~ 460nm. Le mitha ye-ultraviolet eyingozi ibangela ukuba iimolekyuli zombala zibole kwaye ziphele ngenxa yeempendulo zokunciphisa i-oxidation yeekhemikhali. Ukusetyenziswa kwezifunxi ze-ultraviolet kunokuthintela okanye kunciphise umonakalo wemitha ye-ultraviolet kwizinto ezikhuselweyo.

I-UV absorber sisizinzisi sokukhanya esinokufunxa inxalenye yelanga ye-ultraviolet kunye nemithombo yokukhanya ye-fluorescent ngaphandle kokutshintsha. Iiplastiki kunye nezinye izinto ze-polymer zivelisa iimpendulo ze-auto-oxidation phantsi kwelanga kunye ne-fluorescence ngenxa yesenzo semitha ye-ultraviolet, ekhokelela ekonakaleni nasekuwohlokeni kwee-polymers, kunye nokuwohloka kwembonakalo kunye neempawu zoomatshini. Emva kokongeza ii-UV absorbers, esi sibane se-ultraviolet esinamandla aphezulu sinokufunxwa ngokukhetha, sijike sibe ngamandla angenabungozi kwaye sikhutshwe okanye sisetyenziswe. Ngenxa yeentlobo ezahlukeneyo zee-polymers, ubude bemitha ye-ultraviolet ebangela ukuba zonakale nazo zahlukile. Ii-UV absorbers ezahlukeneyo zinokufunxa imitha ye-ultraviolet yemitha ye-wavelengths eyahlukeneyo. Xa kusetyenziswa, ii-UV absorbers kufuneka zikhethwe ngokohlobo lwe-polymer.

Iintlobo ze-UV absorber

Iindidi eziqhelekileyo zezifunxi ze-UV ziquka: i-benzotriazole (ezifana neIsifunxi se-UV 327), i-benzophenone (ezifana neIsifunxi se-UV 531), i-triazine (efana neIsifunxi se-UV 1164), kunye ne-amine ethintelweyo (ezifanaIsiqinisi sokukhanya 622).

Ii-Benzotriazole UV absorbers zezona zisetyenziswa kakhulu eTshayina okwangoku, kodwa isiphumo sokusebenzisa ii-triazine UV absorbers singcono kakhulu kune-benzotriazole. Ii-Triazine absorbers zineempawu ezintle zokufunxa i-UV kunye nezinye iingenelo. Zingasetyenziswa kakhulu kwiipolymers, zinozinzo oluhle kakhulu lobushushu, uzinzo oluhle lokucubungula, kunye nokumelana ne-asidi. Kwizicelo ezisebenzayo, ii-triazine UV absorbers zinesiphumo esihle sokusebenzisana kunye neziqinisi zokukhanya kwe-amine ezithintelweyo. Xa zombini zisetyenziswa kunye, zineziphumo ezingcono kunaxa zisetyenziswa zodwa.

Ii-UV absorbers ezininzi ezibonwa rhoqo

(1)I-UV-531
Umgubo wekristali otyheli okanye omhlophe okhanyayo. Ubuninzi 1.160g/cm³ (25℃). Iqondo lokunyibilika 48~49℃. Inyibilika kwi-acetone, i-benzene, i-ethanol, i-isopropanol, inyibilika kancinci kwi-dichloroethane, ayinyibiliki emanzini. Ukunyibilika kwezinye izinyibilikisi (g/100g, 25℃) yi-acetone 74, i-benzene 72, i-methanol 2, i-ethanol (95%) 2.6, i-n-heptane 40, i-n-hexane 40.1, amanzi 0.5. Njenge-UV absorber, inokufunxa ukukhanya kwe-ultraviolet ngamandla angama-270~330nm. Ingasetyenziswa kwiiplastiki ezahlukeneyo, ngakumbi i-polyethylene, i-polypropylene, i-polystyrene, i-ABS resin, i-polycarbonate, i-polyvinyl chloride. Ihambelana kakuhle nee-resins kunye nokuguquguquka okuphantsi. Idosi iyonke yi-0.1%~1%. Inempembelelo entle yokusebenzisana xa isetyenziswa nenani elincinci le-4,4-thiobis(6-tert-butyl-p-cresol). Le mveliso ingasetyenziswa njengesibambisi sokukhanya kwiingubo ezahlukeneyo.

(2)UV-327
Njengesixhobo sokufunxa i-UV, iimpawu kunye nokusetyenziswa kwayo kufana noko kwe-benzotriazole UV-326. Ingafunxa kakhulu imisebe ye-ultraviolet enobude obuyi-270 ~ 380nm, izinzile kakuhle kwiikhemikhali kwaye iphantsi kakhulu kwi-volatility. Ihambelana kakuhle nee-polyolefins. Ifanelekile ngakumbi kwi-polyethylene kunye ne-polypropylene. Ukongeza, ingasetyenziselwa i-polyvinyl chloride, i-polymethyl methacrylate, i-polyoxymethylene, i-polyurethane, i-unsaturated polyester, i-ABS resin, i-epoxy resin, i-cellulose resin, njl. Le mveliso inokumelana okuhle kakhulu ne-heat sublimation, ukumelana nokuhlanjwa, ukumelana nokufiphala kwegesi kunye nokugcinwa kwepropathi yoomatshini. Inempembelelo ebalulekileyo yokusebenzisana xa isetyenziswa kunye nee-antioxidants. Isetyenziselwa ukuphucula ukuzinza kwe-thermal oxidation yemveliso.

(3)I-UV-9
Umgubo wekristale otyheli okanye omhlophe okhanyayo. Ubuninzi 1.324g/cm³. Iqondo lokunyibilika 62~66℃. Iqondo lokubila 150~160℃ (0.67kPa), 220℃ (2.4kPa). Iyanyibilika kwiintlambululi ezininzi ze-organic ezifana ne-acetone, i-ketone, i-benzene, i-methanol, i-ethyl acetate, i-methyl ethyl ketone, i-ethanol, kodwa ayinyibiliki emanzini. Ukunyibilika kwezinye izintlambululi (g/100g, 25℃) yi-solvent benzene 56.2, n-hexane 4.3, i-ethanol (95%) 5.8, i-carbon tetrachloride 34.5, i-styrene 51.2, i-DOP 18.7. Njengesixhobo sokufunxa i-UV, ifanelekile kwiiplastiki ezahlukeneyo ezifana ne-polyvinyl chloride, i-polyvinylidene chloride, i-polymethyl methacrylate, i-unsaturated polyester, i-ABS resin, i-cellulose resin, njl. Uluhlu oluphezulu lobude bokufunxa yi-280 ~ 340nm, kwaye idosi iyonke yi-0.1% ~ 1.5%. Izinzile kakuhle kubushushu kwaye ayiboli kwi-200℃. Le mveliso ayifumi ukukhanya okubonakalayo, ngoko ke ifanelekile kwiimveliso ezikhanyayo ezikhanyayo. Le mveliso ingasetyenziswa nakwiipeyinti kunye nerabha yokwenziwa.