1) Nqus thiab ua kom HCL tsis muaj zog, tiv thaiv nws cov teebmeem catalytic. Hom stabilizer no suav nrog cov ntsev txhuas, cov xab npum organic acid hlau, cov tshuaj organotin, cov tshuaj epoxy, cov ntsev inorganic, thiab cov ntsev hlau thiol. Lawv tuaj yeem cuam tshuam nrog HCL thiab tiv thaiv cov tshuaj tiv thaiv ntawm PVC kom tshem tawm HCL.
2) Hloov cov chlorine atoms tsis ruaj khov hauv cov molecule PVC inhibits HCL tshem tawm. Yog tias cov organic tin stabilizer sib koom tes nrog cov chlorine atoms tsis ruaj khov ntawm PVC molecule, cov organic tin yuav raug hloov nrog cov chlorine atoms tsis ruaj khov hauv lub cev sib koom tes.
3) Qhov kev sib ntxiv nrog cov qauv polyene cuam tshuam kev tsim ntawm lub kaw lus sib txuas loj thiab txo cov xim. Cov ntsev tsis muaj roj lossis esters muaj cov ntawv cog lus ob npaug, uas dhau los ua qhov kev sib ntxiv diene nrog PVC molecules los ntawm kev sib txuas ob npaug, yog li cuam tshuam lawv cov qauv sib txuas thiab tiv thaiv kev hloov xim.
4) Kev ntes cov dawb radicals thiab tiv thaiv cov tshuaj oxidation, qhov thermal stabilizer no tuaj yeem muaj ib lossis ntau yam teebmeem.
Lub tshuab ua kom sov PVC zoo tagnrho yuav tsum yog cov khoom siv ntau yam lossis cov khoom sib xyaw ua ke uas tuaj yeem ua tiav cov haujlwm hauv qab no: ua ntej, hloov cov khoom siv tsis ruaj khov thiab tsis ruaj khov; Qhov thib ob yog nqus thiab neutralize HCL tso tawm thaum lub sijhawm ua PVC, tshem tawm cov teebmeem catalytic degradation ntawm HCL; Qhov thib peb yog neutralize lossis passivate cov hlau ions thiab lwm yam khoom tsis zoo uas ua lub luag haujlwm catalytic hauv kev puas tsuaj; Qhov thib plaub, ntau hom kev tshuaj lom neeg tuaj yeem thaiv kev loj hlob ntawm cov ntawv cog lus tsis muaj zog thiab tiv thaiv kev puas tsuaj xim; Qhov thib tsib, nws muaj kev tiv thaiv thiab tiv thaiv lub teeb ultraviolet. Feem ntau, cov tshuab ua kom sov siv ua ke raws li lawv cov txiaj ntsig tshwj xeeb, thiab lawv cov kev siv tus kheej tsis tshua muaj. Ntxiv mus, feem ntau ntau yam yog nyob rau hauv daim ntawv hmoov, nrog qee qhov yog cov tshuaj lom heev. Txhawm rau kom yooj yim siv, tiv thaiv kev lom plua plav, txo cov tshuaj lom lossis hloov lawv nrog cov tshuaj tsis muaj tshuaj lom, ntau hom kev sib xyaw ua ke tau tsim ob qho tib si hauv tsev thiab thoob ntiaj teb hauv xyoo tas los no. Piv txwv li, cov khoom siv sib xyaw ua ke German Bear hom, nrog rau cov organic tin lossis composite organic tin stabilizers los ntawm cov tebchaws xws li Tebchaws Meskas, Lub Tebchaws Yelemees, Nyiv, thiab Netherlands, txhua tus muaj feem lag luam loj hauv Suav teb. Yog li ntawd, nws yog qhov xav tau ceev rau kev txhim kho ntawm Tuam Tshoj txoj kev lag luam yas kom txhawb nqa tag nrho kev siv cov khoom sib xyaw ua ke tshiab uas ua haujlwm tau zoo, pheej yig, tsis muaj plua plav, tsis muaj tshuaj lom lossis tsis muaj tshuaj lom.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-06-2023
