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자료유형
학술저널
저자정보
Kim, Dae-Hyun (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life Scie) Kwon, Oh-Jin (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life Scien) Yang, Seong-Ryul (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life S) Park, Jong-Shin (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life Sc)
저널정보
한국섬유공학회 Fibers and Polymers Fibers and polymers 제8권 제3호
발행연도
2007.1
수록면
249 - 256 (8page)

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In this study, polyurethane films were prepared using starch as the main polyol component, and the mechanical properties of these films were investigated. The starch content of the polyols was 30-50 wt%. To confirm the formation of a urethane linkage between the -OH of starch and -NCO of toluene 2,4-diisocyanate, Fourier transform infrared (FT-IR) spectroscopic analysis was performed. Differential scanning calorimetry (DSC) thermograms of the polyurethanes resulted in two endothermic peaks, which shifted to higher temperatures with increasing starch content and -NCO/-OH molar ratio. Due to the melting behavior of polyurethane, films could be prepared by hot pressing at an appropriate temperature. Polyurethane films were prepared with various polyol starch content and -NCO/-OH molar ratios. Tensile testing indicated that the breaking stress and elastic modulus increased significantly with starch content and -NCO/-OH molar ratio. In addition, bending tests indicated an increase in breaking stress and bending modulus with starch content and -NCO/-OH molar ratio and decreased breaking strain. The strain rate in both tensile and bending tests had a significant effect on the mechanical properties.

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