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Thermal Properties and Morphology of Poly(3‐Hydroxybutyrate‐ co ‐3‐Hydroxyvalerate) with Poly(Caprolactone Triol) Mixtures
Author(s) -
Wessler Katiusca,
Nishida Maurício Hajime,
da Silva João,
Pezzin Ana Paula Testa,
Pezzin Sérgio H.
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200651322
Subject(s) - differential scanning calorimetry , crystallinity , polycaprolactone , thermogravimetric analysis , chemical engineering , materials science , scanning electron microscope , plasticizer , triol , caprolactone , glass transition , morphology (biology) , porosity , crystallization , casting , polymer chemistry , nuclear chemistry , chemistry , composite material , diol , polymer , copolymer , physics , genetics , biology , thermodynamics , engineering
Aiming the development of new ductile and porous biodegradable materials, blends of poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate), P(3HB‐ co ‐3HV), and polycaprolactone triol, PCL‐T, with compositions varying from 100/0 to 70/30 P(3HB‐ co ‐3HV)/PCL‐T (w/w), were obtained by casting. The phase behavior, the morphology and the crystallinity of P(3HB‐ co ‐3HV)/PCL‐T blends were studied by differential scanning calorimetry, thermogravimetric analysis, scanning electron microscopy and X‐ray diffraction. DSC analyses showed that the glass transition temperature of P(3HB‐ co ‐3HV) decreases with the addition of PCL‐T up to 15 wt%, evidencing that mixtures with higher PCL‐T contents provide more flexible films, acting as a plasticizer, but the porosity and onset degradation temperature of P(3HB‐ co ‐3HV) are not affected.