Persian Gulf University Journal of Oil, Gas and Petrochemical Technology 2383-2770 1 Number 1 2014 02 01 Synthesis of Polybutadiene Nanoparticles via Emulsion Polymerization: Effect of Reaction Temperature on the Polymer Microstructure, Particle Size and Reaction Kinetics 1 16 4661 10.22034/jogpt.2014.4661 EN Mahdi Abdollahi Polymer Engineering Department, Faculty of Chemical Engineering, Tarbiat Modares University, P.O.BOX:14115-143, Tehran, Iran;Division of Polymer Science and Technology, Research Institute of Petroleum Industry, P.O. Box: 14665-1998, Tehran, Iran Mohammad Reza Yousefi Division of Polymer Science and Technology, Research Institute of Petroleum Industry, P.O. Box: 14665-1998, Tehran, Iran Parisa Alamdar Polymer Engineering Department, Faculty of Chemical Engineering, Tarbiat Modares University, P.O.BOX:14115-143, Tehran, Iran Heidar Ranjbar Reseach and Development Center, Tabriz Petrochemical Company, Tabriz, Iran Fardin Seyyed Najafi Reseach and Development Center, Tabriz Petrochemical Company, Tabriz, Iran Fatemeh Rekabdar Division of Polymer Science and Technology, Research Institute of Petroleum Industry, P.O. Box: 14665-1998, Tehran, Iran Journal Article 2013 08 20 Polybutadiene nanoparticles were synthesized via batch emulsion polymerization of butadiene in the presence of potassium persulfate, disproportionate rosinate potassium cation and t-dodecyl 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 FT-IR 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. 1,4-trans 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.             https://jogpt.pgu.ac.ir/article_4661_f621585df244e9596dc70a39b579efb1.pdf