The role of water during plasticization of native starches

摘要: Abstract Flexible, starch-based plastics of native corn, potato, waxy corn and wheat starch were produced by compression moulding mixtures glycerol in the weight ratio 0.30 (Wglycerol/Wdry starch). In these premixes, water/dry was varied between 0.112 0.422. The mechanical properties moulded starches, with a glass—rubber transition temperature below room temperature, strongly dependent on water content premix. Varying premixes led to large changes strain stress at break. This effect could be explained dependence polysaccharide mobility materials also source, hence composition structure constituting polysaccharides. From results it concluded that both amylose amylopectin formed chain interactions or entanglements materials.