탄성형 에폭시의 흡습 열화에 따른 열적 및 기계적 특성에 관한 연구 = A Study on Thermal and Mechanical Properties of Elastic Epoxy with Water Aging

다국어 초록 (Multilingual Abstract)

In this paper, thermal and mechanical properties of electric epoxy with water aging were discussed. We made elastic epoxy specimen adding a ratio of 0[phr], 20[phr], 35[phr] and 53[phr] with modifier to existing epoxy. We studied mechanical property of elastic resin after absorption in water from 0 to 484 hours. As a result, diffusion factor of elastic epoxy showed 20～21x10-4㎟/s and general epoxy showed 9.5x10-4㎟/s. Elastic property increased linearly according to addiction and decreased according to water absorption. Tensile strength was reduced according to addition. It was affected by water absorption of micro-void of elastic epoxy. Hardness inclined to decrease after increasing according to absorbed time. In water-absorption state, it was experimented a change of heat flow by temperature of elastic epoxy and change of thermal expansion coefficient. DSC (Differential Scanning Calorimetry) and TMA (Thermomechanical Analysis) equipments were used to measure Tg. A temperature range of DSC was from -0[℃] to 200[℃]. One of TMA was from -0[℃] to 350[℃]. In addition, we investigated structural analysis of water absorbed specimen using SEM (Scanning Electron Microscope).

참고문헌 (Reference)

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6 Iain McEwan, "Water absorption in a rubber-modified epoxy resin" Polymer 4213-4222, 1999