Age- induced Changes in Some Properties of Plasticized Soybean Protein Concentrate Films Obtained by Casting and Compression Molding

E.M. CIANNAMEA; L. GONZALEZ GRANADOS; L. NEIRA HAZIME; J. MARTUCCI; P.M. STEFANI; R.A. RUSECKAITE

Barelona

Congreso; Third International Symposium Frontiers in Polymer Science; 2012

Ageing of soybean protein concentrate (SPC) plasticized different amounts of glycerol (Gly) and processed by casting from film-forming solutions at pH 10 and by intensive mixing followed by compression molding was studied over a period of 120 days. Changes on optical, water resistance, oxygen transmission rate (OTR) , tensile and water vapor permeability (WVP) properties of films during ageing were analyzed. All films lost mass continuously during the entire aging period due to leaching of glycerol as revealed by