Heterogeneity of laser‐irradiated films of polyvinyl alcohol/starch blends: effect of glycerol content. (10th January 2013)

• Record Type: Journal Article
• Authors: Sreekumar, P. A.; Al‐Harthi, Mamdouh A.; Gondal, M. A.; De, S. K.
• Is Part Of: Surface and interface analysis. Volume 45:Number 6(2013:Jun.)
• Page Start: 1047
• Page End: 1051
• Publication Date: 2013-01-10
• Subjects: Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.5211
• Languages: English
• ISSNs: 0142-2421

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>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 (ΔH_fus), heat of crystallization (ΔH_cry), temperature of melting (T_m), temperature of crystallization (T_cry) 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 &amp; Sons, Ltd.</p> </abstract>