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|Type:||Artigo de periódico|
|Title:||Hydrolytic degradation of poly(para-dioxanone) films prepared by casting or phase separation|
|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.|
|Editor:||Elsevier Sci Ltd|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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