Abstract
The aim of this work was to study the relationship of chain size of partially hydrolyzed PVA blended with starch in properties of biodegradable sheets produced by thermoplastic extrusion. It was also studied the effect of extrusion temperature profile to determine the better PVA chain size and temperature profile to produce biodegradable sheets through a factorial design. The processability and the mechanical, thermal, optical, and microstructural properties of the biodegradable sheets were adequate, indicating that PVA/cassava starch blends have potential to replace conventional non-biodegradable polymers. Tensile strength and Young’s modulus ranges from 1.0 to 2.6 and 3.0 to 6.9 MPa respectively, the elongation at break ranges from 42 to 421%. It was not possible to state a conclusive relationship between PVA molecular weight and the materials properties, but in general, PVA with medium molecular weight and high extrusion temperature profile promote an increase of mechanical properties of the sheets.
Highlights
Petroleum based plastics are used worldwide in a observed by Scanning Electron Microscopy (SEM) in materials without PVA
Molecular weight and the materials properties, but in general, PVA with medium molecular weight and high extrusion temperature profile promote an increase of mechanical properties of the sheets
Petroleum based plastics are used worldwide in a observed by SEM in materials without PVA
Summary
Petroleum based plastics are used worldwide in a observed by SEM in materials without PVA. Years, several researchers have studied new eco-friendly Films with higher PVA content had better mechanical materials preferentially from renewable resources to replace properties, and the polymers dispersion in the blend was conventional petrochemical polymers[1,2]. Zanela et al.[8] produced extruded sheets based on some drawbacks to replace conventional polymers due to different proportions of starch, PVA and glycerol through a its inherent brittleness, poor mechanical properties, and the mixture design. The authors observed that all formulations hydrophilic character These drawbacks can be overcome were homogeneous, without visible cracks by SEM, by blending starch with other biodegradable polymers like demonstrating a good miscibility between both polymers, polyvinyl alcohol - PVA[4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
