Ethylene-Acrylic Acid 공중합체 / Poly(ethylene glycol) 블렌드의 상용성 및 광분해성에 관한 연구 = A Study on the Miscibility of Poly (ethylene-co-acrylic acid) / Poly (ethylene glycol) Blends and the Photodegradation of the Blend

다국어 초록 (Multilingual Abstract)

The miscibility of poly(ethylene-co-acrylic acid) (EAA) blends with poly (ethylene glycol) (PEG) were studied by analysis of Fourier transform infrared (FT-IR) spectroscopy and differential scanning calorimetry (DSC). Intermolecular hydorgen bonding interactions involving carboxylic acid group and ether oxygen are identified by FT-IR analysis. The melting point depression of crystalline PEG in the blend was observed. The equilibrium melting points of the blends were determined by the Hoffman-Weeks plot. A negative interaction parameter value (x_(12)=-0.702) of the blend at the temperature above the melting point (70℃) of PEG was estimated by using Nishi-Wang equation. The results of thermal and infrared spectroscopic analysis have substantiated that the blends of EAA with PEG are highly mixed at the molecular level.
PEG forms coordination complexes with iron (Ⅲ) chloride (ferric chloride, FeCl₃). Both PEG and PEG-FeCl₃ complexes are susceptible to UV photodegradation. The morphological changes induced by UV irradiation were investigated by DSC and optical microsopy. The presence of the FeCl₃ in the PEG-FeCl₃ complexes and EAA/PEG-FeCl₃ blends markedly accelerates the PEG photodegradation.