Heterogeneity of laser‐irradiated films of polyvinyl alcohol/starch blends: effect of glycerol content

Abstract

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.

Preparation of Miscible PVA/PEG Blends and Effect of Graphene Concentration on Thermal, Crystallization, Morphological, and Mechanical Properties of PVA/PEG (10 wt%) Blend

“…Water-soluble polymers such as PEG and PVA and their blends have found many applications such as packaging [1], cosmetics [2], and emulsifiers and adhesives [3], among others. PVA and its composites have been extensively studied by our group [1,[4][5][6][7][8][9][10][11][12][13][14][15]. With some modifications of the existing polymers, products with low cost and light weight may be developed for a wide range of applications with desirable properties such as mechanical, thermal, and optical properties.…”

Hybrid Ni‐Al layered double hydroxide/graphene reinforced polyvinyl alcohol/starch blends

“…Previously our group conducted several studies to improve the properties of PVA/starch blends. [ 21–32 ] Sreekumar et al [ 22,23 ] studied the compatibility and effect of plasticizer on the mechanical, thermal and ageing characteristics of starch/PVA blend, keeping the blend ratio as constant. Followed by that, studies conducted by Jose et al [ 27–29 ] showed that the carbon nanotubes and graphene affects the compatibilization there by the physical, mechanical, thermal and dielectric characterization of PVA/starch blend.…”