Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/9607
Título: Dynamics of network formation in aqueous suspension RAFT styrene/divinylbenzene copolymerization
Autor: Gonçalves, Miguel
Pinto, Virgínia
Dias, Rolando
Hernándes-Ortiz, Júlio
Costa, Mário Rui
Palavras-chave: Crosslinking
Data: 2013
Editora: WILEY-VCH
Citação: Gonçalves, Miguel; Pinto, Virgínia; Dias, Rolando; Hernándes-Ortiz, Julio; Costa, Mário Rui (2013) - Dynamics of network formation in aqueous suspension RAFT styrene/divinylbenzene copolymerization. In Hans-Ulrich Moritz, Werner Pauer (eds.) Polymer Reaction Engineering – 11th International Workshop e Macromolecular Symposia. ISSN 1521-3900. 333:1, p. 273-385
Relatório da Série N.º: Macromolecular Symposia;
Resumo: Experimental studies concerning the RAFT copolymerization of styrene and commercial divinylbenzene were performed in order to assess the use of controlled radical polymerization for the production of non-conventional polymer networks. Aqueous suspension polymerizations were carried out in stirred batch reactor and changes of a few operation parameters were tried in order to assess their effect on key product properties: reaction temperature, initial ratio monomer/RAFT agent, monomer dilution in the organic phase and crosslinker content in the monomer mixture were changed along the experimental program. Polymerizations were extended beyond the gel point in order to synthesize gel beads. The effect of different commercially available RAFT agents (e.g. S-thiobenzoyl thioglycolic acid and two trithiocarbonates) on network process formation was also studied. Dynamics of gel formation was measured using size exclusion chromatography with refractive index and light scattering detection. Iodine chloride titration yielded pendant double bonds concentration. In-line and offline FTIR-ATR measurements were also performed in order to obtain information concerning the kinetics of formation and final structure of the gels.
Peer review: yes
URI: http://hdl.handle.net/10198/9607
DOI: 10.1002/masy.201300046
Versão do Editor: http://onlinelibrary.wiley.com/doi/10.1002/masy.201300046/abstract
Aparece nas colecções:CIMO - Artigos em Proceedings Não Indexados ao WoS/Scopus

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