Indlela i-bisphenol A esabela ngayo kwi-phosgene ukulungiselela i-polycarbonate

i-bisphenol A i-bpa Impendulo ngePhosgene — Ukulungiswa kwePolycarbonate
Indlela i-bisphenol A BPA esebenza ngayo kunye ne-phosgene yinyathelo elibalulekileyo ekulungiseleleni i-polycarbonate. Kule ndlela yokusebenza, i-carbonyl carbon atom kwi-phosgene ine-electrophilicity enamandla, kwaye i-phenolic hydroxyl oxygen atom ye-bisphenol A isebenza njengeziko le-nucleophilic ukuyihlasela, isenza imveliso ephakathi. Emva koko, imveliso ephakathi ilahlekelwa yimolekyuli enye ye-hydrogen chloride kwaye iyaqhubeka isabela nezinye iimolekyuli ze-bisphenol A BPA kunye ne-phosgene, i-polymerizing kancinci kancinci ukuze yenze i-polycarbonate. Le ndlela yokusebenza idla ngokwenziwa kwi-organic solvent, kwaye i-acid-binding agent kufuneka yongezwe ukuze kufunxwe i-hydrogen chloride eveliswa yi-reaction ukuze kukhuthazwe indlela yokusebenza ukuze kuqhubekeke kwicala elihle. Iimeko ezahlukeneyo zokusabela, ezifana nohlobo lwe-reaction solvent, ukukhethwa kwe-acid-binding agent, kunye nexesha lokuphendula, zonke ziya kuchaphazela umgangatho kunye nokusebenza kwe-polycarbonate. Umzekelo, ukukhetha i-organic solvent efanelekileyo kunokuphucula ukunyibilika kwee-reactants kwaye kwenze ukuba impendulo iqhubeke ngokufanayo; I-arhente efanelekileyo yokubopha i-asidi inokufunxa i-hydrogen chloride ngempumelelo, igcine i-asidi kunye ne-alkalinity yenkqubo yokusabela, kwaye iqinisekise inkqubela phambili ethe tye yempendulo.