Time programmed feed of semi-batch reactors with non-linear radical copolymerizations: An experimental study of the system styrene plus divinylbenzene using SEC/MALLS

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2007

Autores

goncalves, mad (Autor) Outra; dias, rcs (Autor) Outra; costa, mrpfn (Autor) FEUP

Ata de Conferência Internacional

Título: MACROMOLECULAR SYMPOSIA

Páginas: 124-134

9th International Workshop on Polymer Reaction Enginering

Hamburg, GERMANY, OCT 07-10, 2007

Indexação

ISI Web of Knowledge - 15 Citações

Scopus - 14 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-004-DVH

DOI: 10.1002/masy.200751315

Abstract (EN): The radical crosslinking copolymerization of mono and divinyl monomers was experimentally studied with a 2.5 dm(3) semi-batch reactor using styrene + divinylbenzene as a model system. The analysis of products was carried out by SEC with a MALLS detector. The influence of the feed policy of divinylbenzene on the time evolution of the copolymer molecular weights and z-average mean square radius of gyration was assessed. A detailed kinetic model, in the absence of intramolecular reactions but taking into account the presence of the two isomers m- and p- in the commercial divinylbenzene and the different reactivities of the various radicals and double bonds was developed; most parameters have been collected from previous kinetic studies, and only two have been regressed using our measured molecular weights. These results can be used to improve the production of branched/crosslinked polymers with controlled molecular architecture.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11