I-Magnesium oxides (MgOs)zisetshenziswe embonini ye-Rubber iminyaka engaphezu kwe-100.Ngokushesha ngemva kokutholakala kwe-sulfur vulcanization ngo-1839, i-MgO namanye ama-inorganic oxides afakazela ukusheshisa izinga lokwelapha kancane kwesibabule esisetshenziswa sodwa.Kwaze kwafika ekuqaleni kwawo-1900 lapho ama-accelerator ephilayo athuthukiswa futhi athatha indawo ye-magnesium namanye ama-oxide njengama-accelerator ayisisekelo ezinhlelweni zokuphulukisa.Ukusetshenziswa kwe-MgO kwehle kwaze kwaba ngasekuqaleni kwawo-1930 ngesikhathi kuzalwa i-elastomer entsha yokwenziwa eyasebenzisa le oxide kakhulu ukuze iqinise futhi inciphise (i-acid scavenge) i-compound-polychloroprene (CR).Ngisho namanje, ekuqaleni kwekhulu leminyaka elizayo, ukusetshenziswa okuyinhloko kwe-MgO embonini yenjoloba kusesezinhlelweni zokwelapha ze-polychloroprene (CR).Ngokuhamba kweminyaka, abahlanganisi babona izinzuzo ze-MgO kwamanye ama-elastomer afana nalawa: i-chlorosulfonated polyethylene (CSM), i-fluoroelastomer (FKM), i-halobutyl (CIIR, BIIR), i-hydrogenated NBR (HNBR), i-polyepichlorohydrin (ECO) phakathi kwabanye.Ake siqale sibheke ukuthi kanjaniama-MgO webanga lenjolobaziyakhiqizwa kanye nezakhiwo zazo.
Ekuqaleni kwemboni yenjoloba uhlobo olulodwa lwe-MgO lwalutholakala-lunzima (ngenxa yobuningi bayo).Lolu hlobo lwakhiqizwa ngokubola okushisayoama-magnesites emvelo(MgCO2).Ibanga eliwumphumela lalivame ukungcolile, lingasebenzi kakhulu futhi linosayizi omkhulu wezinhlayiyana.Ngokuthuthukiswa kwe-CR, abakhiqizi be-magnesia bakhiqize ukukhanya okusha, okuphakeme, okusebenzayo, okuncane kwezinhlayiyana ezincane ze-MgO-extra light.Lo mkhiqizo wenziwe ngokubola okuyisisekelo kwe-magnesium carbonate (MgCO3).Isasetshenziswa nanamuhla kwezemithi nezimonyo, le MgO yathathelwa indawo usayizi wezinhlayiyana osebenza kakhulu, omncane we-MgO-light noma ukukhanya kobuchwepheshe.Cishe wonke ama-compounders enjoloba asebenzisa lolu hlobo lwe-MgO.Ikhiqizwa izakhiwo ze-magnesium ezibola ngokushisa kwezinhlobo ezi-2: zaqhubekai-hydroxide (Mg(OH)2).Ukuminyana kwayo ngobuningi kuphakathi kokukhanya okusindayo nokungaphezulu futhi inomsebenzi ophezulu kakhulu kanye nosayizi wezinhlayiyana ezincane.Lezi zakhiwo ezimbili zokugcina-umsebenzi kanye nosayizi wezinhlayiyana-kuyizinto ezibaluleke kakhulu kunoma iyiphi i-MgO esetshenziswa ekuhlanganiseni kwenjoloba.
Isikhathi sokuthumela: Nov-15-2022