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이상일,서석훈,홍경민,신용섭,장상희,신부영 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1
Bio-and-photodegradable polymer composites were prepared by blending biodegradable aliphatic polyester and photodegradable master batch(M/B). Photodegradability, biodegradability, thermal properties and mechanical properties were investigated. The biodegradability of EnPol(G4600) composites decreased wish increasing the amount of M/B, while that of EnPol(G8000) composites increased. Tensile strength and elongation decreased with increasing the time of outdoor exposure and the amount of M/B but modulus comparatively maintained. The mechenical properties decreased as the content of M/B increased, while the melting temperature unchanged.
식용 가능한 펙틴/전분 블렌드 필름의 기계적 물성 및 가스 투과도
서석훈,홍경민,신용섭,류시옥,김봉식,신부영 한국공업화학회 2002 응용화학 Vol.6 No.1
Mechanical properties and gas permeabilities of edible films based on the blends of pectin with starch plasticized with glycerol were investigated. Tensile properties of pectin/starch blend films were changed significantly by the amount of glycerol and the ratio of pectin/starch. Tensile strength and modulus decreased as the content of glycerol increasing. With increasing glycerol content, elongation at break increased. Water absorption of pectin/starch blend films was changed by amount of glycerol but it was relatively little changed by the ratio of pectin/starch. Oxygen permeability of pectin/starch blend films was generally lower than of plastic films.
Clay를 함유한 펙틴/전분 나노복합체의 기계적 물성 및 가스 투과도
서석훈,홍경민,신용섭,김성보,서길수,신부영 한국공업화학회 2002 응용화학 Vol.6 No.2
Mechanical properties and gas permeability of biodegradable Pectin/Starchmontmorillonite clay (filler) have been studied. Tensile strength and modulus was increased as the increasing content of montmorillonite. X-ray diffraction was used to assess the periodic distance of the clay layers and transmission electron microscopy was used to to observe the composite morphology. The periodic distance of the stacks was 21.76∼26.12 Å for the processed composites. Thus suggests that the layers of the clay particles have been intercalated. Oxygen permeability of pectin/starch-clay composites was generally lower than that of plastic films.
이상일,신용섭,신부영,서석훈,홍경민 한국공업화학회 2001 응용화학 Vol.5 No.2
Polycaprolactone (PCL) has been blended with thermoplastic starch (TPS) which was prepared from corn starch with glycerol using twin-screw extruder. The mechanical, thermal and biodegradability of blends was examined. Differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) studies revealed that PCL/TPS blends are immiscible blend but the surface adhesion was very good. Biodegradability of blends increased with increasing TPS content.