Kinetics and latex particles analysis on styrene emulsion polymerization induced by 60Co γ rays in presence of anionic polymerizable emulsifier
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60Co γ rays induced styrene emulsion polymerizations were carried out with sodium undec-10-enoate (UDNa) as emulsifier at room temperature and the different kinetics was discussed. The influence of absorbed dose rate, monomer concentration and emulsifier concentration on kinetics and latex particles was studied. The polymerization kinetics relation was found as R P ∝ D0.37·M0.75·E0.70 (R P , maximum polymerization rate; D, absorbed dose rate; M, monomer concentration; E, emulsifier concentration). The particles’ diameter increases and particle size distribution (PSD) becomes narrower with the decrease of absorbed dose rate and increase of monomer content. The effect of UDNa content on particles’ diameter and particle size distribution is the same as that of emulsifier in conventional emulsion system. This type of emulsion polymerization can easily form monodisperse particles.
Keywords60Co γ rays induced emulsion polymerization Polystyrene Particle size distribution Kinetics Polymerizable emulsifier
This work was financially supported by Natural Scientific Research Innovation Foundation in Harbin Institute of Technology (IMXK57080027) and the Research Foundation Harbin Institute of Technology at Weihai (IMJQ10070013).
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