Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/9640
Título: Development of cyclic propagation kinetics for modeling the nitroxide-mediated radical copolymerization of styrene-divinylbenzene
Autor: Aguiar, Leandro
Gonçalves, Miguel
Pinto, Virgínia
Dias, Rolando
Costa, Mário Rui
Giudici, Reinaldo
Palavras-chave: Crosslinking
Gelation
Kinetics (polym.)
Living polymerization
Modeling
Data: 2014
Editora: WILEY-VCH
Citação: Aguiar, Leandro; Gonçalves, Miguel; Pinto, Virgínia; Dias, Rolando; Costa, Mário Rui; Giudici, Reinaldo (2014) - Development of cyclic propagation kinetics for modeling the nitroxide-mediated radical copolymerization of styrene–vivinylbenzene. Macromolecular Reaction Engineering. ISSN 1862-832X. 8:4, p. 282-294
Relatório da Série N.º: Macromolecular Reaction Engineering;
Resumo: A kinetic model including the cyclic propagation (cyclization) is proposed for the nitroxide-mediated radical copolymerization of styrene–divinylbenzene. The method involves a balance of sequences of units, which connect a radical center and a pendant double bond present in the same polymer chain. The rate constant for cyclization was considered a function of the sequence length. Good agreement between the model predictions and experimental data for solution and suspension controlled copolymerizations was found. The rate constant of cyclization for the smallest ring (3 monomeric units) was estimated to be 700 s−1 at 90 °C, and the activation energy was estimated to be 32 500 cal mol−1
Peer review: yes
URI: http://hdl.handle.net/10198/9640
DOI: 10.1002/mren.201300105
Versão do Editor: http://onlinelibrary.wiley.com/doi/10.1002/mren.201300105/abstract
Aparece nas colecções:DTQB - Artigos em Revistas Indexados ao ISI/Scopus

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