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Type: Artigo de periódico
Title: Hydrolytic degradation of poly(para-dioxanone) films prepared by casting or phase separation
Author: Pezzin, APT
Duek, EAR
Abstract: Poly(para-dioxanone) (PPD) films have been prepared by casting and phase separation, varying the concentration of the polymeric solution (2.5, 5 and 10% w/v) using hexafluoro-isopropanol as solvent and ethanol as non-solvent. The hydrolytic degradation of PPD films was studied. The samples were immersed in a phosphate buffer solution (pH = 7.4) at 37 +/- 1 degreesC for 1, 2, 4 and 6 weeks. The degradation was evaluated by analyzing the variation of melting enthalpy (DeltaH(m)) and crystallinity, determined by differential scanning calorimetry (DSC), initial temperature of mass loss (T-onset) and temperature of maximum mass loss (T-peak), determined by thermogravimetric analysis (TGA), and morphological changes observed by scanning electron microscopy (SEM). (C) 2002 Elsevier Science Ltd. All rights reserved.
Subject: biomaterials
phase separation
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Identifier DOI: 10.1016/S0141-3910(02)00174-X
Date Issue: 2002
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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