Yadda bisphenol A ke amsawa da phosgene don shirya polycarbonate

bisphenol A bpa Amsawa da Phosgene — Shiri na Polycarbonate
Amsar bisphenol A BPA tare da phosgene muhimmin mataki ne a cikin shirya polycarbonate. A cikin wannan amsawar, ƙwayar carbonyl carbon a cikin phosgene tana da ƙarfin electrophilicity, kuma ƙwayar phenolic hydroxyl oxygen atom na bisphenol A tana aiki a matsayin cibiyar nucleophilic don kai hari gare ta, tana samar da samfurin matsakaici. Sannan, samfurin matsakaici yana rasa kwayar hydrogen chloride ɗaya kuma yana ci gaba da amsawa tare da wasu ƙwayoyin bisphenol A BPA da phosgene, a hankali yana yin polymerization don samar da polycarbonate. Wannan amsawar yawanci ana yin ta ne a cikin wani sinadari na halitta, kuma ana buƙatar ƙara wakili mai ɗaure acid don sha hydrogen chloride da amsawar ta samar don haɓaka amsawar don ci gaba zuwa ga alkibla mai kyau. Yanayi daban-daban na amsawa, kamar nau'in sinadari na amsawa, zaɓin wakilin ɗaure acid, da lokacin amsawa, duk zasu shafi inganci da aikin polycarbonate. Misali, zaɓar mai narkewa na halitta mai dacewa zai iya inganta narkewar masu amsawa kuma ya sa amsawar ta ci gaba da daidaito; wani wakili mai dacewa da ke ɗaure acid zai iya shan hydrogen chloride yadda ya kamata, ya kiyaye acidity da alkalinity na tsarin amsawar, kuma ya tabbatar da ci gaban amsawar cikin sauƙi.