Polymer cov ntaub ntawv nyob rau hauv nws synthesis, cia thiab ua thiab zaum kawg daim ntawv thov nyob rau hauv tag nrho cov theem tej zaum yuav deteriorate, uas yog, kev ua tau zoo ntawm cov khoom deteriorates, xws li yellowing, txheeb ze molecular loj poob, cov khoom nto tawg, luster poob, loj dua yog ua rau muaj kev cuam tshuam. Lub zog, flexion lub zog, tensile lub zog thiab elongation thiab lwm yam khoom siv kho tshuab txo qis. Yog li cuam tshuam rau kev siv ib txwm siv ntawm cov khoom siv polymer. Qhov tshwm sim no yog hu ua chemical aging ntawm plastics, hu ua aging. Los ntawm kev pom tshuaj, cov ntaub ntawv yas, txawm tias ntuj lossis hluavtaws, muaj qee yam qauv molecular, qee qhov ntawm cov khoom muaj qee qhov tsis muaj zog, cov ntawv cog lus tsis muaj zog no dhau los ua cov tshuaj tiv thaiv. Lub ntsiab ntawm cov yas laus yog tsis muaj dab tsi ntau tshaj li cov tshuaj tiv thaiv tshuaj, uas yog, tshuaj lom neeg cov tshuaj tiv thaiv (xws li oxidation cov tshuaj tiv thaiv) nrog tsis muaj zog bonds raws li ib tug pib taw tes thiab ib tug series ntawm tshuaj tiv thaiv. Nws tuaj yeem tshwm sim los ntawm ntau qhov laj thawj, xws li tshav kub, lub teeb ultraviolet, kev ntxhov siab ntawm cov khoom siv hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, thiab lwm yam, tuaj yeem yog ib qho kev sib txuas, lossis kev sib xyaw ua ke. Qhov tshwm sim yog tias cov qauv molecular ntawm cov khoom siv polymer hloov pauv thiab cov txheeb ze molecular loj txo qis los yog tsim crosslinking, kom cov khoom ua haujlwm tsis zoo thiab tsis tuaj yeem siv.
Qhov feem ntau ua rau muaj kev laus yog kub thiab ultraviolet lub teeb, vim hais tias ib puag ncig nyob rau hauv uas plastics raug feem ntau los ntawm ntau lawm, cia, ua rau cov khoom siv yog tshav kub thiab tshav ntuj (ultraviolet light). Txoj kev tshawb fawb txog kev laus ntawm cov yas los ntawm ob hom kev ib puag ncig no yog qhov tseem ceeb tshwj xeeb rau cov neeg siv tswv yim.
Qhov siab tshaj plaws ua kom wavelength ntawm cov polymers
Vim li cas thiaj ua rau kev sim hlawv?
1. Kev tshuaj xyuas cov ntaub ntawv thiab cov qauv
2. Kev sib piv ntawm cov neeg sib tw
3. Nrhiav kev ua tsis tiav
4, txhim kho kev laus tiv thaiv
5. Lub neej expectancy
Qhov zoo thiab qhov tsis zoo ntawm kev tawm sab nraum zoov
Sab nraum zoov ncaj qha raug hais txog kev raug tshav ntuj ncaj qha thiab lwm yam kev nyab xeeb, thiab yog txoj hauv kev ncaj qha tshaj plaws los ntsuas huab cua ntawm cov ntaub ntawv.
Qhov zoo:
Nws yog kev sib tw zoo
Yooj yim thiab yooj yim rau kev khiav lag luam
Tus nqi qis
Tsis muaj zog:
Feem ntau lub sij hawm ntev heev
Ntiaj teb no climate diversity
Qhov rhiab heev ntawm cov qauv sib txawv yog sib txawv hauv cov huab cua sib txawv
1. Xenon teeb lub teeb aging test method→ Xenon aging test chamber← Nyem no kawm ntxiv!
Xenon arc teeb simulate tag nrho spectrum ntawm lub hnub ci, uas muaj xws li ultraviolet, pom thiab infrared lub teeb spectrum. Filtered xenon arc teeb yog qhov zoo tshaj plaws rau kev ntsuas lub teeb ruaj khov ntawm cov khoom xws li pigments, dyes thiab inks, uas yog rhiab rau lub teeb ntev-yoj nyob rau hauv tshav ntuj thiab pom lub teeb. Xenon arc teeb tuaj yeem kho lawv cov spectral zog faib thiab tuaj yeem simulate lub teeb ntuj nyob rau hauv ntau yam xwm txheej, los ntawm tshav ntuj sab nraum qhov chaw mus rau hnub ci los ntawm lub qhov rais iav. Tsis tas li ntawd, los ntawm kev hloov cov hluav taws xob siv hluav taws xob, qhov kub thiab txias, av noo thiab lwm yam tsis zoo ntawm lub teeb xenon, koj tuaj yeem simulate kev siv cov khoom sib txawv, xws li sab hauv thiab sab nraum lub tsheb. Daim duab 3 qhia txog kev sib piv spectral ntawm txawv irradiance ntawm xenon teeb thiab ntuj lub teeb, nyob rau hauv uas lub teeb siv ntawm 0.55W / m2 yog qhov ze tshaj rau ntuj lub teeb. Tam sim no, kev siv lub teeb xenon rau cov khoom siv hluav taws xob nrawm nrawm tau dhau los ua qhov kev nyiam tshaj plaws thiab cov qauv kev laus kho qhov muag, thiab muaj ntau txoj hauv kev xenon teeb kev laus, xws li ISO, ASTM, SAE J, GM thiab lwm yam.
2. Ultraviolet fluorescent lub teeb aging test method→ UV aging test chamber ← Nyem no kawm ntxiv!
Lub teeb fluorescent UV yog lub teeb qis mercury nrog lub wavelength ntawm 254nm. Lub zog faib ntawm lub teeb fluorescent UV nyob ntawm qhov emission spectrum generated los ntawm phosphorus coexistence thiab diffusion ntawm iav raj. Lub teeb fluorescent tau muab faib ua UVA thiab UVB, thiab koj daim ntawv thov raug txiav txim siab seb hom UV yuav tsum siv li cas. Cov lus hauv qab no yog qhov kev faib tawm thiab kev ua haujlwm ntawm daim ntawv thov ntawm UV teeb.
Nta:
UVA:
Nta: UVA teeb yog tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau kev sib piv ntau hom kev kuaj polymer. Txij li UVA teeb tsis muaj qhov tso zis hauv qab 295 nm qhov chaw txiav tawm ntawm lub hnub ci ib txwm, lawv feem ntau degrade cov khoom tsawg dua li UVB teeb. Txawm li cas los xij, lawv feem ntau ua rau muaj kev sib raug zoo dua rau kev laus sab nraum zoov.
Main lub teeb hom:
UVA-340: Lub UVA-340 muab qhov zoo tshaj plaws simulation ntawm lub hnub ci nyob rau hauv cheeb tsam ntawm lub yoj luv luv ntawm 365 nm mus rau lub hnub ci cutoff point ntawm 295 nm. Peak emission ntawm 340 nanometers. UVA-340 teeb yog tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau kev sib piv ntawm cov qauv sib txawv.
UVA-351: UVA-351 ua raws li ib feem ntawm ultraviolet ntawm lub hnub ci dhau los ntawm lub qhov rais pane. Qhov no yog qhov zoo tshaj plaws rau kev siv sab hauv tsev, tshwj xeeb tshaj yog rov ua dua qhov poob ntawm cov polymers uas tshwm sim hauv qhov rais ib puag ncig. Lub teeb no yog siv dav hauv cov khoom siv hauv tsev thiab cov khoom siv hauv tsheb sab hauv.
UVB:
Nta: UVB teeb yog dav siv rau kev kuaj ceev thiab kev lag luam ntawm cov khoom siv ruaj khov. Tam sim no muaj ob hom UVB teeb. Lawv tsim tib lub wavelength ntawm ultraviolet lub teeb, tab sis tag nrho lub zog tsim tawm txawv. Tag nrho cov teeb UVB emit luv wavelengths ntawm ultraviolet lub teeb, 295 nanometers hauv qab lub hnub ci cutoff point. Txawm hais tias qhov no yog qhov ntsuas luv-yoj UV-nrawm, qee zaum nws tuaj yeem ua rau cov txiaj ntsig txawv txav.
Main lub teeb hom:
Uvb-313el: UVB-313EL yog qhov siv ntau tshaj plaws QUV teeb rau UVB raug. Nws yog ib qho tseem ceeb heev nyob rau hauv maximizing acceleration rau kev ntsuam xyuas ntawm cov khoom ruaj khov heev xws li automotive coatings thiab vov tsev cov ntaub ntawv. UVB-313EL teeb kuj tseem siv tau hauv QC daim ntawv thov.
QFS-40: Qhov no yog thawj QUV teeb. QFS-40 teeb tau siv tau ntau xyoo thiab tseem tau teev tseg rau kev siv ntau txoj hauv kev, tshwj xeeb tshaj yog nyob rau hauv chav kawm ntawv txheej txheem tsheb. QFS-40 yog qhov zoo tshaj plaws siv nyob rau hauv QUV / qhov txawv txav.
Cov qauv rau kev kuaj pom qhov kub hnyiab
ASTM G154 / G53 Fluorescent UV Teeb raug kuaj txheej txheem rau cov khoom tsis yog xim hlau
ASTM D4329-05 Fluorescent UV Exposure test rau cov yas
ASTM D4674-02Kev Ntsuas Xim nrawm nrawm ntawm cov yas raug rau qhov chaw ua haujlwm sab hauv tsev
ISO 4892-3: 2006 Plastics - Raug rau qhov chaw kuaj lub teeb - fluorescent ultraviolet teeb
GB/T 16422.
ASTM G155 / G26 Xenon Teeb raug kuaj rau cov khoom tsis yog xim hlau
ASTM D2565-99(2008) Raug rau lub tog raj kheej yas rau sab nraum zoov siv
ASTM D4459-06 Sab Hauv Tsev Xenon Tawm los ntawm cov teeb yas
ISO 4892-2: 2006 Plastics - Raug rau qhov chaw kuaj teeb pom kev - Xenon teeb
GB/T 16422.2: 1999 Exposure test for plastics laboratory light source - Xenon teeb