Mathematical Modeling of Inverse Miniemulsion Polymerization of Acrylamide with an Oil-Soluble Initiator

Autor(es)

Torraga, Maria G. F. ^[1] ; Colman, Maria M. E. ^[2] ; Giudici, Reinaldo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Politecn, Dept Chem Engn, Av Prof Luciano Gualberto Travessa 3 380, Cidade U, BR-05308010 Sao Paulo, SP - Brazil

^[2] Natl Univ Asuncion, Polytech Sch, Bio & Mat Lab, San Lorenzo 111421, SL - Paraguay

• Tipo de documento: Artigo Científico
• Fonte: Industrial & Engineering Chemistry Research; v. 60, n. 43, p. 15428-15442, NOV 3 2021.
• Citações Web of Science: 0

Resumo

A model is proposed for the inverse miniemulsion polymerization of acrylamide (AAm) with an oil-soluble initiator. The model is based on the assumptions that (1) polymerization occurs in both the continuous phase and the polymer particles; (2) the radicals in the continuous phase with length that exceeds z(crit) can enter the monomer droplets; (3) a limited number of radicals can exist inside the polymer particles; (4) small radicals can exit the polymer particles; and (5) propagation is diffusion-controlled at high conversions. The model predictions of conversion, particle number, and the occurrence of a diffusion-controlled propagation reaction at high conversions were validated by comparison with experimental data for inverse miniemulsion polymerization, showing good agreement. The occurrence of diffusion-controlled propagation ({''}glass effect{''}) at high conversions is also discussed and additionally validated with literature data. (AU)

• Processo FAPESP: 15/50684-9 - Sustainable gas pathways for Brazil: from microcosm to macrocosm
• Beneficiário: Reinaldo Giudici
• Modalidade de apoio: Auxílio à Pesquisa - Temático