Crystallization Behavior of Poly(3-hydroxybutyrate) (PHB), Poly(ε-caprolactone) (PCL) and Their Blend (50:50 wt.%) Studied by 2D FT-IR Correlation Spectroscopy
作者： Miriam Unger , Harumi Sato , Yukihiro Ozaki , Heinz W. Siesler
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摘要: Variable-temperature FT-IR spectra of poly(3-hydroxybutyrate) (PHB), poly(e-caprolactone) (PCL) and a PHB/PCL (50:50 wt.%) blend were analyzed by two-dimensional correlation spectroscopy (2DCOS). For this purpose the ν(CO) region was employed to characterize in some detail crystallization behavior investigated polymer systems during cooling from melt. The asynchronous 2D clearly captured existence three components crystallinity-sensitive CO stretching mode for PHB PCL, respectively: well-ordered, an inter-mediate less ordered crystalline state. Furthermore, 2DCOS application sequential order observed structural changes could be proposed whole temperature range both polymers. In case blend, we have split up spectral data set sub-sets between 200–120 °C 70–30 °C more detailed analysis. way separate process PCL blend.
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