A simple model for the semicontinuous heterophase polymerization: Ethyl methacrylate as a case example |
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| Authors: | Abraham G Alvarado Rosaura Hernández-Montelongo Martin Rabelero Lourdes A Pérez-Carrillo Jorge E Puig Francisco López-Serrano |
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| Affiliation: | 1. Departamento de Ingeniería Mecánica, Universidad de Guadalajara, Boul. M. García-Barragán # 1451 Guadalajara, JAL, 44430 México;2. Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García-Barragán # 1451 Guadalajara, JAL, 44430 México;3. Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México. Ciudad Universitaria. Cd. Mx., 04510 México City, México |
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| Abstract: | A simple but comprehensive model considering homogeneous and micellar nucleation, coagulation, entry of radicals to particles and to micelles and radicals' exit from particles, is presented. The model is validated, in a starved semicontinuous heterophase polymerization of ethyl methacrylate, at three monomer addition rates. The model accurately describes the overall and instantaneous conversion, the average particle density and diameter, and the number and weight average molar masses evolutions over time. It is found that even though the average number of radicals is much smaller than 0.5, the system is not 0-1. An empirical function was used to describe the gel effect. The homogeneous nucleation was the prevailing mechanism for particle formation and large exit rates of radicals were observed. POLYM. ENG. SCI., 60: 223–232, 2019. © 2019 Society of Plastics Engineers |
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