| 초록 |
Most of the biodegradable polymers have some drawbacks in thermal, mechanical and barrier properties. In this study, preparation ofnanocomposites based on biodegradablepoly(ester)urethane was attempted to overcome the defects of PU itself. The dispersion state of clays in the nanocomposites was observed using XRD analysis and TEM observation. In addition, the effects of the clay contents on the mechanical tensile and barrier properties were investigated. In order toexamine theinfluence of clay on biodegradability, films were decomposed in incubator(58℃±2℃, moist condition) with compost as a function of decomposition time. The biodegradabilitywasevaluated in terms of measurements ofmolecular weight, mechanical and barrier properties. It was confirmed that the incorporated claysubstantiallygave a contribution in suppression ofthe bio-decomposition rate of the films due to increased permeation resistancetooxygen and water vapor molecules. |
