Mechanical Properties and Morphology of Pectin/Starch Blend Films

펙틴/전분 블렌드 필름의 기계적 물성 및 형태학

  • Shin, Boo-Young (School of Chemical Engineering and Technology, Yeungnam University)
  • 신부영 (영남대학교 응용화학공학부)
  • Received : 1999.07.01
  • Accepted : 1999.10.12
  • Published : 1999.11.10

Abstract

Mechanical properties and morphology of pectin/starch blend films depending upon the composition and plasticizer ratio were studied. Blends were prepared continuously in a twin-screw extruder. Films were prepared using a single-screw extruder with slit die. Most of the blends showed a good thermoplastic behavior, while the blends with very high ratio of pectin/starch had a poor thermoplasticity. Tensile properties of blend films were changed significantly by the amount of glycerol and relatively little by the ratio of pectin/starch. Differential scanning calorimetry(DSC) curves of wet blends showed a transition similar to glass transition temperature(Tg) at about $125^{\circ}C$. It was found by Scanning electron microscopy(SEM) study that there exists a good interfacial adhesion between pectin and starch.

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