Heterogeneity of laser-irradiated films of polyvinyl alcohol/starch blends: effect of glycerol content
Article first published online: 10 JAN 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Surface and Interface Analysis
Volume 45, Issue 6, pages 1047–1051, June 2013
How to Cite
Sreekumar, P. A., Al-Harthi, M. A., Gondal, M. A. and De, S. K. (2013), Heterogeneity of laser-irradiated films of polyvinyl alcohol/starch blends: effect of glycerol content. Surf. Interface Anal., 45: 1047–1051. doi: 10.1002/sia.5211
- Issue published online: 1 MAY 2013
- Article first published online: 10 JAN 2013
- Manuscript Revised: 6 DEC 2012
- Manuscript Accepted: 6 DEC 2012
- Manuscript Received: 4 JUN 2012
- polyvinyl alcohol;
- thermal properties
The present paper reports the results of studies on the effect of laser irradiation on the morphology and thermal properties of starch/polyvinyl alcohol (PVA) blend, with varying glycerol concentration. Differential scanning calorimeter results showed that laser irradiation increased the heat of fusion (ΔHfus), heat of crystallization (ΔHcry), temperature of melting (Tm), temperature of crystallization (Tcry) and percentage crystallinity as a function of the amount of glycerol. It is believed that breakdown of the intermolecular hydrogen bonding between the starch and PVA causes an increase in the blend heterogeneity. These results are corroborated with the findings from thermogravimetric analysis and scanning electron microscope images. Copyright © 2013 John Wiley & Sons, Ltd.