Extrusion of Thermoplastic Starch: Effect of -Green- and Common Polyethylene on the Hydrophobicity CharacteristicsReportar como inadecuado




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Novel plastics that are biodegradable, environmentally benign, and made from renewable natural resources are currently being researched as alternatives to traditional petroleum-based plastics. One such plastic, thermoplastic starch TPS is produced from starch processed at high temperatures in the presence of plasticizers, such as water and glycerol. However, because of its hydrophilic nature, TPS exhibits poor mechanical properties when exposed to environmental conditions, such as rain or humidity. The overall objective of this research work was to produce a thermoplastic starch based material with low water absorption that may be used to replace petroleum-based plastics. With a recent emergence of -green- polyethylene GPE, sourced from renewable feedstock, it has become possible to develop novel biodegradable polymers for various applications. In this work, GPE was melt blended with starch in three different ways; reactive extrusion of GPE and starch facilitated by maleic anhydride MAH and dicumyl peroxide DCP, melt blending of GPE and starch by extrusion, and melt blending of maleated polyethylene and starch by extrusion. Comprehensive testing and analysis has shown that all methods reduced water absorption significantly with some variations across the board.

KEYWORDS

Biopolymers, Thermoplastic Starch, Biodegradable, Green Polyethylene, Hydrophobic, Water Absorption, Melt-Blending of Starch, Renewable Resources

Cite this paper

Pervaiz, M. , Oakley, P. and Sain, M. 2014 Extrusion of Thermoplastic Starch: Effect of -Green- and Common Polyethylene on the Hydrophobicity Characteristics. Materials Sciences and Applications, 5, 845-856. doi: 10.4236-msa.2014.512085.





Autor: Muhammad Pervaiz1,2*, Philip Oakley1,3, Mohini Sain1,4,5

Fuente: http://www.scirp.org/



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