Microemulsion Polymerization Modeling Based on the Experimental Conversion Trend and its Derivative |
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| Authors: | F López-Serrano J E López-Aguilar E Mendizábal J E Puig J Álvarez |
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| Institution: | 1. Facultad de Química. Departamento de Ingeniería Química, Universidad Nacional Autónoma de México, D. F. 04510;2. CUCEI, Departamentos de Química e Ingeniería Química, Universidad de Guadalajara. Guadalajara, Jalisco, 44430;3. Departamento de Ingeniería Química e Hidráulica. Universidad Autónoma Metropolitana-Iztapalapa, D. F. 09340. All from Mexico |
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| Abstract: | In this work, the microemulsion polymerization modeling problem is addressed with an integrodifferential approach. The procedure was applied to experimental data, previously presented, on the microemulsion polymerization of hexyl methacrylate (C6MA) and styrene (STY). It was found that: (i) the nucleation rate is not linear with time, as assumed before, (ii) a vitreous effect is observed even in reactions where the polymer's glass transition temperature is lower than the reaction temperature, (iii) radical entry to polymer particles and coagulation among particles are negligible, (iv) the rate decrease interval is also caused by a reduction of active sites, (v) a mechanism in which micelles provide monomer to living particles was detected, and (vi) a simple three-parameter mechanistic model was obtained, capable of describing the studied systems. |
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| Keywords: | kinetics mechanism microemulsion polymerization modeling |
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