Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior de Tecnologia e Gestão >
Tecnologia Química e Biológica >
DTQB - Artigos em Revistas Indexados ao ISI/Scopus >

Please use this identifier to cite or link to this item:

Título: A general kinetic analysis of non-linear irreversible copolymerizations
Autor: Costa, Mário Rui
Dias, Rolando
Palavras-chave: Non-linear
Issue Date: 1994
Editora: Elsevier
Citação: Costa, Mário; Dias, Rolando (1994) - A general kinetic analysis of non-linear irreversible copolymerizations. Chemical Engineering Science. ISSN 0009-2509. 49:4, p.491-516
Resumo: Irreversible non-linear copolymerizations with arbitrarily great numbers of monomers are described specifying the stoichiometric coefficients of the reactions involving end-groups. Rate equations for the vectorial generating function or discrete transform of the distribution of end-groups and repeating units and its derivatives with respect to logarithms of Laplace parameters can thus be written. Similar rate equations can be written for the discrete transforms of the distributions of descendants of each linking group with respect to their numbers of end-groups. This allows the prediction of gel properties, such as the concentration of elastically active network chains and mass fraction of pendant material. Mass balance equations using these rate laws are non-linear partial differential equations solvable by the method of characteristics. Numerical methods are developed for computing molecular weight distributions and average molecular weights before and after gelation, as well as the weight fraction of sol ang gel properties related to its elasticity behaviour. The curing of a tetraepoxide with a primary diamine is taken as a case study and results are compared with predictions by the theory of branching processes.
Arbitragem científica: yes
ISSN: 0009-2509
Versão do Editor:
Appears in Collections:DTQB - Artigos em Revistas Indexados ao ISI/Scopus

Files in This Item:

File Description SizeFormat
CESCIENCE94.pdf7,98 MBAdobe PDFView/Open

Please give feedback about this item
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


© Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
Promotores do RCAAP   Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência PO Sociedade do Conhecimento (POSC) Portal oficial da União Europeia