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   synthesis of polybutadiene nanoparticles via emulsion polymerization: effect of reaction temperature on the polymer microstructure, particle size and reaction kinetics  
   
نویسنده abdollahi mahdi ,yousefi mohammad reza ,alamdar parisa ,ranjbar heidar ,seyyed najafi fardin ,rekabdar fatemeh
منبع journal of oil, gas and petrochemical technology - 2014 - دوره : 1 - شماره : 1 - صفحه:1 -16
چکیده    Polybutadiene nanoparticles were synthesized via batch emulsion polymerization of butadiene in the presence of potassium persulfate, disproportionate rosinate potassium cation and tdodecyl mercaptane as initiator, emulsifier and chain transfer agent, respectively. polymerization reaction was performed at different temperatures (60, 70 and 80 °c). conversion was measured at the various time intervals by gravimetry method. particle size and its distribution of the polybutadiene latex were measured by dynamic light scattering (dls) and sem analyses. polymer microstructure was investigated by ftir spectroscopy. by increasing the polymerization temperature, average diameter of polybutadiene nanoparticles decreased from 104 nm (at final conversion of 80.6%) at 60 °c to 88.7 nm (at final conversion of 98.0%) at 80 °c. dominant microstructure, i.e. 1,4trans isomer content, in the synthesized polymers was calculated to be about 60%. results showed that by increasing the reaction temperature, particles’ size decreases while number of the polymer particles and polymerization rate increase.
کلیدواژه emulsion polymerization ,polybutadiene nanoparticles ,polymerization kinetics ,reaction temperature ,polymer microstructure
آدرس tarbiat modares university, faculty of chemical engineering, polymer engineering department, ایران. research institute of petroleum industry, division of polymer science and technology, ایران, research institute of petroleum industry, division of polymer science and technology, ایران, tarbiat modares university, faculty of chemical engineering, polymer engineering department, ایران, tabriz petrochemical company, reseach and development center, ایران, tabriz petrochemical company, reseach and development center, ایران, research institute of petroleum industry, division of polymer science and technology, ایران
 
     
   
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