Dependence of the Mechanical Properties of a Pullulan Film on the Preparation Temperature(Analytical Chemistry)

概要

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The mechanical properties of pullulan films prepared at various temperatures were investigated. The films prepared at high temperatures (40℃ and 60℃ ; H-films) did not show any clear plastic deformation in tensile test, indicating that they were brittle. In contrast, those prepared at low temperatures (4℃, 13℃, and 25℃ ; L-films) showed such deformation. The latter films had higher values for both tensile strength and elastic modulus than the former, indicating that the L-films were stiffer and more flexible than the H-films. Stretching the L-films clearly showed a shear deformation band inclined at 45° to the stretching direction, indicating that they were amorphous.
社団法人日本農芸化学会の論文
2003-04-23