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Thermal properties and non‐isothermal crystallization behavior of biodegradable poly( p ‐dioxanone)/poly(vinyl alcohol) blends
Author(s) -
Zhou ZhiXuan,
Wang XiuLi,
Wang YuZhong,
Yang KeKe,
Chen SiChong,
Wu Gang,
Li Jun
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1904
Subject(s) - vinyl alcohol , differential scanning calorimetry , thermogravimetric analysis , materials science , crystallization , crystallinity , thermal stability , chemical engineering , polymer chemistry , isothermal process , glass transition , scanning electron microscope , thermal analysis , polymer , composite material , thermal , thermodynamics , physics , engineering
Blends of two biodegradable semicrystalline polymers, poly( p ‐dioxanone) (PPDO) and poly(vinyl alcohol) (PVA) were prepared with different compositions. The thermal stability, phase morphology and thermal behavior of the blends were studied by using thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). From the TGA data, it can be seen that the addition of PVA improves the thermal stability of PPDO. DSC analysis showed that the glass transition temperature ( T g ) and the melting temperature ( T m ) of PPDO in the blends were nearly constant and equal to the values for neat PPDO, thus suggesting that PPDO and PVA are immiscible. It was found from the SEM images that the blends were phase‐separated, which was consistent with the DSC results. Additionally, non‐isothermal crystallization under controlled cooling rates was explored, and the Ozawa theory was employed to describe the non‐isothermal crystallization kinetics. Copyright © 2006 Society of Chemical Industry