Magnesium Oxide Amagwiritsidwa Ntchito Pamakampani a Rubber

Magnesium oxides (MgOs)akhala akugwiritsidwa ntchito mu Rubber Viwanda kwa zaka zopitilira 100.Atangodziwika kuti sulfure vulcanization mu 1839, MgO ndi ma inorganic oxides adawonetsa kuti akufulumizitsa kuchiritsa kwapang'onopang'ono kwa sulufule yomwe imagwiritsidwa ntchito yokha.Sizinachitike mpaka koyambirira kwa zaka za m'ma 1900 pomwe ma organic accelerators adapangidwa ndikulowa m'malo mwa magnesiamu ndi ma oxides ena ngati ma accelerator oyambira pamachiritso.Kumwa kwa MgO kunachepa mpaka kumayambiriro kwa zaka za m'ma 1930 pamene kubadwa kwa elastomer yatsopano yopangira yomwe inagwiritsa ntchito okusayidi kwambiri kuti akhazikike ndi kusokoneza (acid scavenge) pawiri-polychloroprene (CR).Ngakhale pano, koyambirira kwa zaka zana zikubwerazi, kugwiritsidwa ntchito koyambirira kwa MgO mumsika wa raba kudakali mu njira zochizira polychloroprene (CR).Kwa zaka zambiri, ophatikizira adazindikira ubwino wa MgO mu ma elastomer ena monga: chlorosulfonated polyethylene (CSM), fluoroelastomer (FKM), halobutyl (CIIR, BIIR), hydrogenated NBR (HNBR), polyepichlorohydrin (ECO) pakati pa ena.Choyamba tiyeni tione mmenemphira giredi MgOsamapangidwa ndi katundu wawo.

Kumayambiriro kwa malonda a mphira mtundu umodzi wokha wa MgO unalipo-wolemera (chifukwa cha kuchuluka kwake).Mtundu uwu unapangidwa ndi kuwola kwa thermallymaginito achilengedwe(MgCO2).Chotsatira kalasi nthawi zambiri zodetsedwa, osati kwambiri yogwira ndipo anali lalikulu tinthu kukula.Ndi chitukuko cha CR, opanga magnesia anapanga kuwala kwatsopano, kwakukulu, kogwira ntchito, kakang'ono kakang'ono ka MgO-kuwala kowonjezera.Izi zidapangidwa ndi kuwola koyambirira kwa magnesium carbonate (MgCO3).Zomwe zimagwiritsidwabe ntchito masiku ano m'zamankhwala ndi zodzoladzola, MgO iyi inasinthidwa ndi yogwira kwambiri, yaying'ono ya tinthu tating'ono MgO-kuwala kapena kuwala kwaukadaulo.Pafupifupi onse opanga mphira amagwiritsa ntchito mtundu uwu wa MgO.Amapangidwa ndi katundu wa magnesium wowola mowola 2 mitundu: idapitilirahydroxide (Mg(OH)2).Kuchulukana kwake kuli pakati pa kuwala kolemera ndi kowonjezera ndipo kumakhala ndi ntchito yaikulu kwambiri ndi kukula kwa tinthu tating'ono.Zinthu ziwiri zomalizazi-ntchito ndi kukula kwa tinthu-ndizofunika kwambiri pa MgO iliyonse yomwe imagwiritsidwa ntchito popanga mphira.