Kinetic modeling of the copolymerization of acrylic acid and trimethylolpropane triacrylate over pre and post-gelation periods

Autor(es)

Aguiar, Leandro G. ^[1] ; Souza, Esmar F. ^[2] ; Giudici, Reinaldo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Chem Engn, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil

^[2] Univ Sao Paulo, Escola Politecn, Dept Chem Engn, BR-05508010 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN POLYMER JOURNAL; v. 74, p. 264-278, JAN 2016.
• Citações Web of Science: 2

Resumo

A kinetic model based on method of moments, balance of species and sequences and numerical fractionation was developed for acrylic acid - TMPTA copolymerization. Solution copolymerizations of acrylic acid with trimethylolpropane triacrylate (TMPTA), initiated by sodium persulfate, were carried out at 55 degrees C. The model was compared with a different approach from literature and validated with experimental data from present work. It was a found an acrylic acid propagation rate coefficient at 6000 L mol(-1) s(-1) for the studied conditions. The simulations were successfully performed with a maximum number of generations in the range 3-5. The model was able to provide fair predictions for the studied experiments and additional information about the dead polymer chains formed, such as gel fraction, molecular weight distribution and concentration of cyclic chains. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/11532-0 - Síntese e caracterização de hidrogéis de poli(ácido acrílico): modelagem matemática e aplicações em liberação controlada de medicamento
• Beneficiário: Leandro Gonçalves de Aguiar
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/22080-9 - Estudo experimental e modelagem matemática da produção de resinas à base de estireno e de suas aplicações em catálise heterogênea
• Beneficiário: Leandro Gonçalves de Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Regular