Ukwethulwa kwe-Absorber UV

Ukukhanya kwelanga kuqukethe ukukhanya okuningi kwe-ultraviolet okuyingozi ezintweni ezinemibala. Ubude bayo begagasi bucishe bube ngu-290 ~ 460nm. Le misebe ye-ultraviolet eyingozi ibangela ukuthi ama-molecule ombala abole futhi afiphele ngokusabela kokunciphisa i-oxidation-chemical. Ukusetshenziswa kwama-absorber ultraviolet kungavimbela ngokuphumelelayo noma kunciphise umonakalo wemisebe ye-ultraviolet ezintweni ezivikelwe.

I-Absorber ye-UV iyisinzinzisi sokukhanya esingamunca ingxenye ye-ultraviolet yokukhanya kwelanga kanye nemithombo yokukhanya ye-fluorescent ngaphandle kokuzishintsha. Ipulasitiki nezinye izinto ze-polymer zikhiqiza ukusabela kwe-auto-oxidation ngaphansi kokukhanya kwelanga kanye ne-fluorescence ngenxa yesenzo semisebe ye-ultraviolet, okuholela ekulimazeni nasekuwohlokeni kwama-polymers, kanye nokuwohloka kokubukeka kanye nezakhiwo zemishini. Ngemva kokwengeza ama-absorbers e-UV, lokhu kukhanya kwe-ultraviolet okunamandla aphezulu kungamuncwa ngokukhetha, kukwenze kube amandla angenangozi futhi kukhishwe noma kudliwe. Ngenxa yezinhlobo ezahlukene zama-polymers, ubude begagasi bemisebe ye-ultraviolet ebangela ukuba iwohloke nawo ahlukene. Ama-absorber we-UV ahlukene angamunca imisebe ye-ultraviolet yamaza ahlukene. Lapho usebenzisa, ama-absorbers e-UV kufanele akhethwe ngokusho kohlobo lwe-polymer.

Izinhlobo ze-UV absorber

Izinhlobo ezijwayelekile zokumunca i-UV zifaka: i-benzotriazole (njengeIsibani se-UV 327), i-benzophenone(njengeIsibani se-UV 531), i-triazine(njengeIsibambisi se-UV 1164), futhi yavimbela i-amine(njengeI-Light Stabilizer 622).

Izimunyisi ze-Benzotriazole UV okwamanje ziyizinhlobonhlobo ezisetshenziswa kakhulu e-China, kodwa umphumela wokufakwa kwezimuphi ze-UV ze-triazine ungcono kakhulu kune-benzotriazole. Ama-absorption e-Triazine anezindawo ezinhle kakhulu zokumuncwa kwe-UV kanye nezinye izinzuzo. Angasetshenziswa kabanzi kuma-polymers, abe nokuzinza okuhle kakhulu kokushisa, ukuqina okuhle kokucubungula, nokumelana ne-asidi. Ezisetshenziswayo ezingokoqobo, izimunyisi ze-UV ze-triazine zinomphumela omuhle we-synergistic onezinzinzisi zokukhanya ze-amine ezivinjiwe. Lapho zombili zisetshenziswa ndawonye, ​​zinemiphumela engcono kunalapho zisetshenziswa zodwa.

Ama-absorber amaningi e-UV avame ukubonakala

(1)UV-531
Impushana ecwebezelayo ephuzi noma emhlophe. Ukuminyana 1.160g/cm³ (25℃). Iphoyinti lokuncibilika 48~49 ℃. Incibilika ku-acetone, benzene, ethanol, isopropanol, inyibilika kancane ku-dichloroethane, ayincibiliki emanzini. Ukuncibilika kwezinye izincibilikisi (g/100g, 25℃) i-acetone 74, benzene 72, methanol 2, ethanol (95%) 2.6, n-heptane 40, n-hexane 40.1, amanzi 0.5. Njengesimunyisi se-UV, singamunca kakhulu ukukhanya kwe-ultraviolet ngobude begagasi obungu-270~330nm. Ingasetshenziswa kumapulasitiki ahlukahlukene, ikakhulukazi i-polyethylene, i-polypropylene, i-polystyrene, i-ABS resin, i-polycarbonate, i-polyvinyl chloride. Inokuhambisana okuhle nama-resin kanye nokuguquguquka okuphansi. Umthamo ojwayelekile ngu-0.1%~1%. Inomphumela omuhle we-synergistic uma isetshenziswa nenani elincane le-4,4-thiobis(6-tert-butyl-p-cresol). Lo mkhiqizo ungasetshenziswa futhi njenge-stabilizer yokukhanya yezingubo ezihlukahlukene.

(2)UV-327
Njengesimunyisi se-UV, izici zayo nokusetshenziswa kwayo kuyafana naleyo ye-benzotriazole UV-326. Ingakwazi ukumunca ngokuqinile imisebe ye-ultraviolet enobude obungamaza angu-270~380nm, inokuqina okuhle kwamakhemikhali kanye nokuguquguquka okuphansi kakhulu. Inokuhambisana okuhle nama-polyolefin. Ifaneleka ngokukhethekile i-polyethylene ne-polypropylene. Ngaphezu kwalokho, ingabuye isetshenziselwe i-polyvinyl chloride, i-polymethyl methacrylate, i-polyoxymethylene, i-polyurethane, i-polyester engasetshenzisiwe, i-ABS resin, i-epoxy resin, i-cellulose resin, njll. Lo mkhiqizo unokumelana okuhle kakhulu nokushisa kwe-sublimation, ukumelana nokugeza, ukumelana negesi ephelayo kanye nokugcinwa kwempahla yemishini. Inomphumela obalulekile we-synergistic uma isetshenziswa ngokuhambisana nama-antioxidants. Isetshenziselwa ukuthuthukisa ukuzinza kwe-oxidation yomkhiqizo.

(3)UV-9
Impushana ecwebezelayo ephuzi noma emhlophe. Ukuminyana 1.324g/cm³. Iphoyinti lokuncibilika 62~66 ℃. Iphoyinti lokubilisa 150~160℃ (0.67kPa), 220℃ (2.4kPa). Incibilika kuzincibilikisi eziningi eziphilayo njenge-acetone, i-ketone, i-benzene, i-methanol, i-ethyl acetate, i-methyl ethyl ketone, i-ethanol, kodwa engancibiliki emanzini. Ukunyibilika kwezinye izinyibilikisi (g/100g, 25℃) yi-solvent benzene 56.2, n-hexane 4.3, ethanol (95%) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP 18.7. Njenge-Absorption ye-UV, ifanele amapulasitiki ahlukahlukene afana ne-polyvinyl chloride, i-polyvinylidene chloride, i-polymethyl methacrylate, i-polyester engagcwele, i-ABS resin, i-cellulose resin, njll. Ububanzi be-wavelength obuphezulu bokumuncwa bungama-280~340nm, kanti isilinganiso esijwayelekile singu-1.51%. Inokuqina okuhle kokushisa futhi ayiboli ku-200 ℃. Lo mkhiqizo awukutholi neze ukukhanya okubonakalayo, ngakho ulungele imikhiqizo ekhanyayo enombala okhanyayo. Lo mkhiqizo ungasetshenziswa nakupende kanye nerabha yokwenziwa.

 


Isikhathi sokuthumela: May-09-2025