Artículos de revistas
Melt behaviour, crystallinity and morphology of poly(p-dioxanone)
Registro en:
Polymer. Elsevier Sci Ltd, v. 42, n. 19, n. 8303, n. 8306, 2001.
0032-3861
WOS:000169391000043
10.1016/S0032-3861(01)00273-7
Autor
Pezzin, APT
van Ekenstein, GOR
Duek, EAR
Institución
Resumen
The melt behaviour of poly(p-dioxanone) (PPD) has been studied by differential scanning calorimetry (DSC). Crystallinity and morphology were evaluated by modulated differential scanning calorimetry (MDSC) and polarizing optical microscopy. The melting curves showed two melting endotherms, a higher melting (HM) peak at a constant temperature of 105 degreesC and a lower melting (LM) peak at temperatures depending on the crystallization temperature T-c. The corresponding peak temperature increased linearly with T-c, yielding an extrapolated value for the equilibrium melting temperature, T(m)degrees, of 114 degreesC. The occurrence of HM peak is a result of recrystallization. The optical micrographs showed a spherulitic morphology, with regular concentric rings, which might be caused by a periodical twisting of the lamellae during crystallization. (C) 2001 Elsevier Science Ltd. All rights reserved. 42 19 8303 8306