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Author(s): Maria do Pilar Gonçalves
J.M.P.Q. Delgado
R. O. Nasser
M. Vázquez da Silva
Cristina Andrade
Title: Dynamic and equilibrium swelling of biodegradable starch-based superabsorbent polymers
Issue Date: 2008
Abstract: A series of biodegradable superabsorbent polymers (SAP's) based on starch grafted with acrylic acid (AA) and crosslinked with N,N'-methylenebisacrylamide (MBIS) were obtained. The parameters that define SAP's properties, such as starch type, amount of initiator, acrylic acid and crosslinker concentrations, and degree of neutralization were varied. The dynamic swelling was interpreted in terms of both a simple power of time equation and a more detailed model based on a coupled diffusion-relaxation mechanism. The diffusivity coefficients calculated from diffusion-relaxation model were compared with the microimages obtained by optical microscopic
Subject: Outras ciências da engenharia e tecnologias
Other engineering and technologies
Scientific areas: Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
Engineering and technology::Other engineering and technologies
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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