Preparation and chloroacetylation modification of polystyrene microspheres
The crosslinked polystyrene microspheres(PS)matrix was prepared by suspension polymeriza-tion,and chloroacetylated polystyrene microspheres(PS-Cl)were obtained by Friedel-Crafts reaction on the surface.The effects of solvent type,acylation reagent amount,catalyst amount,reaction time and sol-vent amount on PS-Cl load and chloroacetyl chloride coversion rate were investigated.The products were characterized by FTIR,SEM and PSD,and the thermal stability of the products was investigated.The re-sults showed that the average particle size of polystyrene microspheres were 63.24 μm.The highest load-ing capacity of PS-Cl microspheres was 4.350 6 mmol/g and the conversion rate of chloroacetyl chloride was57.13%under the reaction conditions of PS,acylation reagent(Reg)and catalyst AlCl3 molar ratio of1∶1.2∶1.2(1.00 g of PS microspheres),reaction time of 4 h and solvent dichloromethane of 20 mL.
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