Dab tsi yog cov yam ntxwv ntawm ib puag ncig tus phooj ywg calcium zinc stabilizers:
Calcium zinc stabilizers yog nitric oxide synthases tsim los ntawm calcium zinc organic ntsev, hypophosphite esters, polyether polyols, antioxidants, thiab organic solvents. Calcium zinc stabilizers muaj kev sib raug zoo nrog epoxy resins thiab thickeners, zoo pob tshab, thiab tsis yooj yim rau precipitate. Lawv siv me me thiab yooj yim siv. Txawm li cas los xij, lawv muaj qhov tsis zoo ntawm qhov tsis muaj zog wettability, txo qhov muag muag ntawm cov khoom, thiab kev cia ntev ntev yuav ua rau pwm loj hlob. Cov khoom hauv lub xeev sib xyaw calcium zinc xab npum stabilizers yog tsim los ntawm polyether xab npum, ua raws li lauric acid xab npum thiab fatty acid xab npum. Cov yam ntxwv ntawm calcium zinc stabilizers yog zoo wetting, uas tsis txo qhov softening point ntawm PVC nyuaj khoom, thiab yog tsim rau zus tau tej cov PVC kav thiab PVC profiles. Cov khoom tsim thiab ua tiav los ntawm microemulsion thev naus laus zis tuaj yeem tshem tawm cov teeb meem uas tau hais tseg.
Peb tsuas yog tsom mus rau ob qho kev txhim kho: txhawm rau txhim kho cov xim nyob rau theem pib, cov nyiaj zinc xab npum txaus ntxiv, thiab cov tshuaj tua kab mob antioxidant yog siv los kho cov zinc chloride uas tsis muaj teeb meem, uas dhau los ua cov zinc ntau thiab txo cov nyiaj. ntawm zinc xab npum ntxiv rau suppress zinc hlawv.
Kev siv cov tshuaj tua kab mob los hloov cov txheej txheem xim dhau los ua rau muaj kev sib xyaw zinc tsawg, uas yog dav siv tsis yog hauv cov khoom muag xwb tab sis kuj tseem muaj cov thermal stability thiab clarity ntawm calcium zinc stabilizers. Nws kuj tseem tau ua tiav hauv kev tsim thiab ua cov khoom siv tawv, txhawm rau kom tswj tau cov calcium / zinc zoo dua thaum tiv thaiv cov xim thaum ntxov thiab tiv thaiv zinc hlawv.
Feem ntau, cov ntsev ntsev tsuas yog txuas rau saum npoo ntawm PVC cov khoom, thiab lawv cov nyhuv yog sib npaug los thaiv kev khi ntawm PVC hais, ua rau cov yas ua kom qeeb qeeb, txo kev sib txhuam ntawm PVC hais, thiab txo cov nyhuv txiav hauv PVC. Cov khoom siv ntau lawm bears qis dua, thiab cov hmoov txhuas siv ntsev ntau dua. Qhov denser cov me me ntawm cov ntsev ntsev, qhov tseem ceeb ntawm cov nyhuv thib ob. Tsoos ntsuab thiab ib puag ncig tus phooj ywg cov khoom xws li calcium zinc stabilizers muaj zog electronegativity thaum lub sij hawm plasticization txheej txheem. Cov pab pawg ua haujlwm optically muaj cov kab mob sib kis nrog cov ntsiab lus sib txuas ntawm PVC epoxy resin, ua kom muaj kev sib raug zoo nrog lub zog muaj zog heev, uas ua rau tsis muaj zog lossis tshem tawm cov kev nyiam ntawm ion bonds hauv ntau txheej ntawm PVC. Qhov no yog qhov qhib saw ntawm PVC uas yog coiled nrog ib leeg, ua rau nws yooj yim dua rau sab nraud diffusion. Cov qauv molecular ntawm pawg ua haujlwm ua rau nws yooj yim dua rau PVC kom kis tau. Qhov nruab nrab ciam teb yooj yim rau cov yas ntawm PVC epoxy resin.
Post lub sij hawm: Aug-19-2024
