Abstract: ABS resin was synthesized by continuous bulk polymerization in a selfdeveloped plug flow reactor, and effects of process parameters including reaction temperature, concentration of initiator, concentration of chain transfer agent on the grafting ratio, molecular weight and particle size of the resultant ABS resin were investigated. The relationship between impact strength and microstructure was also studied. On the basis of the results, the synthetic technology for ABS was optimized, and the impact strength of ABS products was improved from 160 J/m to 221 J/m.

Key words: acrylonitrile-butadiene-styrene copolymer, continuous mass polymerization, process optimization, impact strength