Proceedings of the Polymer Society of Korea Conference (한국고분자학회:학술대회논문집)

The Polymer Society of Korea (한국고분자학회)
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Effect of Polyolic Plasticizers on Rheological and Thermal Properties of Zein Resins

  • Oromiehie, A.R. (Department of Plastic, Iran Polymer and Petrochemical Institute) ;
  • Ghanbarzadeh, B. (Departemant of Food science and technology, University of Tabrizt) ;
  • Musavi, S.M. (Department of Biosystem engineering, University of Tehran)
  • Published : 2006.10.13
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Abstract

Zein protein is one of the best biopolymer for edible film making and polyols are convenient plasticizers for biopolymers. Sorbitol, glycerol and manitol at three levels (0.5, 0.7, 1g/g of zein) were used as plasticizers. Rheological and thermal properties of zein resins were studied for determining their plasticization effectiveness. Sorbitol and glycerol had good plasticizing effects and could decrease viscoelastic modulus of zein resins considerably, but manitol was not as effective as them. Effects of plasticizers on thermal properties of resins were investigated by DSC at -100 to $150^{\circ}C$. No crystallization and melting peaks related to zein resin and plasticizers were observed. Thermograms showed that polyolic plasticizers and zein resin remained a homogeneous material throughout the cooling and heating cycles.

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