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Crystallization behavior of crystalline/crystalline blend system of Poly(caprolactone) (PCL) and Poly (hexylene adipate) (PhAd)

Rohindra, David and Lata, Roselyn A. (2017) Crystallization behavior of crystalline/crystalline blend system of Poly(caprolactone) (PCL) and Poly (hexylene adipate) (PhAd). UNSPECIFIED.

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Abstract

There is an increasing interest in studying crystalline/crystalline blend systems in the last decade because of the different morphological structures formed during the crystallization process. Of particular interest is blend systems formed from polymers with similar thermal properties. In this study crystalline/crystalline blend system of polycaprolactone (PCL) and poly (hexylene adipate) (PhAd), having similar thermal properties was studied. Miscibility and crystallization behavior were investigated using Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR) and Polarized Light Microscopy (PLM). Miscibility was confirmed by the presence of a homogeneous phase in the melt state. All the blends showed a major crystallization exotherm around 30 0C. For blends with PCL content less than 40%, an additional crystallization exotherm at low temperatures was observed (Fig. 1 inset) and is due to fractional crystallization. A similar behaviour has also been seen in PESub/PEO blend [1]. The intensity of the crystalline bands of PCL and PhAd at 841 cm-1 and 911cm-1 respectively was monitored by FTIR (Fig. 2) to explain the crystallization kinetics of each component in the blend system. Blends isothermally crystallized at 47 0C showed simultaneous increase in both the band’s absorbance with PhAd showing a faster crystallization rate. The crystallization process of the blends at 47 0C was delayed with increasing PCL content.

Item Type: Other
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Ms Shalni Sanjana
Date Deposited: 27 Jan 2017 15:38
Last Modified: 27 Jan 2017 15:38
URI: http://repository.usp.ac.fj/id/eprint/9574
UNSPECIFIED

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