Copper inhibitor lossis tooj liab deactivator yog cov khoom siv ntxiv uas siv rau hauv cov ntaub ntawv polymer xws li yas thiab roj hmab. Nws lub luag haujlwm tseem ceeb yog txhawm rau tiv thaiv kev laus catalytic nyhuv ntawm tooj liab lossis tooj liab ions ntawm cov ntaub ntawv, tiv thaiv cov khoom degradation, discoloration, los yog txhua yam khoom degradation los ntawm kev sib cuag nrog tooj liab. Nws yog ib qho tseem ceeb tshwj xeeb hauv kev lag luam xws li cov kav hlau, cable sheath, cov khoom ntim hluav taws xob, thiab lwm yam.
Copper thiab nws cov alloys (xws li cov xov hlau) tau siv dav hauv kev xa hluav taws xob, tab sis thaum tooj liab los rau hauv kev sib cuag ncaj qha nrog qee yam khoom siv polymer (xws li PVC, polyethylene), nws yuav ua rau muaj teeb meem hauv qab no:
Catalytic oxidation:
Cu2 + yog ib qho muaj zog oxidation catalyst uas ua rau cov oxidative puas ntawm polymer molecular chains, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias.
Acid corrosion:
Nyob rau hauv cov ntaub ntawv halogenated xws li PVC, tooj liab yuav hnov mob nrog cov decomposed HCl los tsim tooj liab chloride (CuCl2), ntxiv cov khoom ua kom nrawm dua (tus kheej catalytic nyhuv).
Cov tsos mob deterioration:
Kev tsiv teb tsaws ntawm tooj liab ions tuaj yeem ua rau ntsuab lossis dub me ntsis (tooj liab xeb) tshwm rau saum npoo ntawm cov khoom, cuam tshuam rau nws cov tsos.
Lub mechanism ntawm kev txiav txim ntawm deactivator
Deactivators inhibit qhov tsis zoo ntawm tooj liab los ntawm cov hauv qab no:
Chelated tooj liab ions:
Ua ke nrog dawb Cu2 +, ruaj khov complexes yog tsim los thaiv lawv cov catalytic kev ua si (xws li benzotriazole tebchaw).
Passivation ntawm tooj liab nto:
Tsim ib zaj duab xis tiv thaiv ntawm tooj liab kom tiv thaiv kev tso tawm ntawm tooj liab ions (xws li cov organic phosphorus compounds).
Neutralizing acidic tshuaj:
Hauv PVC, qee qhov deactivators tuaj yeem nruab nrab HCl uas tsim los ntawm kev puas tsuaj, txo qhov corrosion ntawm tooj liab (xws li lead ntsev stabilizers uas kuj muaj tooj liab ua haujlwm).
Copper Deactivators yog ib hom "Tus Saib Xyuas Tsis Pom Zoo" hauv cov ntaub ntawv polymer uas txuas ntxiv lub neej kev pab cuam ntawm cov khoom xws li hlau sheathes los ntawm inhibiting cov catalytic kev ua ntawm tooj liab. Lub hauv paus ntawm nws cov thev naus laus zis yog nyob rau hauv cov tshuaj chelation meej thiab nto passivation, thaum sib npaug ib puag ncig tus phooj ywg thiab tus nqi-zoo. Nyob rau hauv tus tsim ntawm hlau casing, lub coordinative formula ntawmcov deactivators, nplaim retardantthiab lwm yam additives yog tus yuam sij los xyuas kom meej lub sij hawm ntev kev ntseeg ntawm cov ntaub ntawv.
Post lub sij hawm: Mar-05-2025