Magnesium Oxide siv rau kev lag luam roj hmab

Magnesium Oxides (MgOs)tau siv nyob rau hauv Kev Lag Luam Roj Hmab rau ntau tshaj 100 xyoo.Tsis ntev tom qab qhov kev tshawb pom ntawm sulfur vulcanization nyob rau hauv 1839, MgO thiab lwm yam inorganic oxides tau ua pov thawj los ua kom qeeb qeeb ntawm cov sulfur siv ib leeg.Nws tsis yog txog thaum ntxov 1900s thaum cov organic accelerators tau tsim thiab hloov magnesium thiab lwm yam oxides ua thawj accelerators nyob rau hauv cov txheej txheem kho.MgO noj tau txo kom txog thaum xyoo 1930s thaum yug los ntawm cov khoom siv hluav taws xob tshiab uas siv cov oxide no kom ruaj khov thiab nruab nrab (acid scavenge) cov compound-polychloroprene (CR).Txawm tias tam sim no, thaum pib ntawm lub xyoo pua tom ntej, kev siv MgO hauv kev lag luam roj hmab tseem nyob hauv polychloroprene (CR) kho tshuab.Nyob rau hauv xyoo tas los, compounders paub txog cov txiaj ntsig ntawm MgO hauv lwm cov elastomers xws li: chlorosulfonated polyethylene (CSM), fluoroelastomer (FKM), halobutyl (CIIR, BIIR), hydrogenated NBR (HNBR), polyepichlorohydrin (ECO) ntawm lwm tus.Cia peb saib ua ntej yuav ua li casroj hmab qib MgOsyog tsim thiab lawv cov khoom.

Thaum ntxov hauv kev lag luam roj hmab tsuas yog ib hom MgO muaj-hnyav (vim nws qhov ntom ntom).Hom no tau tsim los ntawm thermally decomposingntuj magnesite(MgCO2).Cov qhab nia tshwm sim feem ntau tsis huv, tsis nquag nquag thiab muaj qhov loj me me.Nrog rau txoj kev loj hlob ntawm CR, cov tuam txhab magnesia tsim ib qho tshiab, siab purity, nquag nquag, me me me me MgO-ntxiv lub teeb.Cov khoom no yog tsim los ntawm thermally decomposing yooj yim magnesium carbonate (MgCO3).Tseem siv niaj hnub no hauv cov chaw muag tshuaj thiab tshuaj pleev ib ce, qhov MgO no tau hloov los ntawm kev ua haujlwm zoo heev, me me me me MgO-teeb los yog lub teeb ci.Yuav luag txhua cov roj hmab compounders siv hom MgO.Nws yog tsim los ntawm thermally decomposing magnesium zog 2 hom: txuas ntxivhydroxide (Mg (OH) 2).Nws cov ntom ntom yog nruab nrab ntawm qhov hnyav thiab muaj teeb ci ntxiv thiab muaj kev ua si ntau thiab me me.Cov tom kawg ob lub zog-kev ua haujlwm thiab qhov loj me-yog cov khoom tseem ceeb tshaj plaws ntawm ib qho MgO siv hauv kev sib xyaw roj hmab.