In the case of tow prepreg applied to high-pressure pressure vessels, physical / chemical properties such as mechanical properties, heat resistance, and chemical resistance of the tow prepreg are very important because they are used under harsh conditions. In particular, it must withstand high press...
In the case of tow prepreg applied to high-pressure pressure vessels, physical / chemical properties such as mechanical properties, heat resistance, and chemical resistance of the tow prepreg are very important because they are used under harsh conditions. In particular, it must withstand high pressures, so it must satisfy both high strength and high elongation. Generally, most epoxy resins have high glass transition temperature higher than room temperature, but they are low in elasticity and therefore have brittleness, low impact strength and fracture toughness. Therefore, for application to high-pressure pressure vessels, improvement of physical properties at high strength / high elongation rate is required through toughening of epoxy system. In this study, five epoxies were selected considering the equivalence and viscosity in order to select the epoxy for the optimal tow prepreg, and the properties such as tensile strength, compressive strength, glass transition temperature and thermal expansion coefficient were evaluated by applying general hardener Bisphenol A type epoxy was selected as the best epoxy. For various physical properties and fracture analysis, CTBN, a rubber-based spherical toughener, and a block copolymer, carbon nanotube, and nanodiamond, which are carbon-based linear and spherical toughener, were applied to the selected optimum epoxy. As a result, the toughness of the rubber toughener is accompanied by a decrease in the hardness and a decrease in the glass transition temperature, so that it would be difficult to apply it to areas where the dimensional deformation is strictly controlled, such as in a high-pressure vessel. And it was considered that the application of a small amount of carbon-based toughener would be effective.
In the case of tow prepreg applied to high-pressure pressure vessels, physical / chemical properties such as mechanical properties, heat resistance, and chemical resistance of the tow prepreg are very important because they are used under harsh conditions. In particular, it must withstand high pressures, so it must satisfy both high strength and high elongation. Generally, most epoxy resins have high glass transition temperature higher than room temperature, but they are low in elasticity and therefore have brittleness, low impact strength and fracture toughness. Therefore, for application to high-pressure pressure vessels, improvement of physical properties at high strength / high elongation rate is required through toughening of epoxy system. In this study, five epoxies were selected considering the equivalence and viscosity in order to select the epoxy for the optimal tow prepreg, and the properties such as tensile strength, compressive strength, glass transition temperature and thermal expansion coefficient were evaluated by applying general hardener Bisphenol A type epoxy was selected as the best epoxy. For various physical properties and fracture analysis, CTBN, a rubber-based spherical toughener, and a block copolymer, carbon nanotube, and nanodiamond, which are carbon-based linear and spherical toughener, were applied to the selected optimum epoxy. As a result, the toughness of the rubber toughener is accompanied by a decrease in the hardness and a decrease in the glass transition temperature, so that it would be difficult to apply it to areas where the dimensional deformation is strictly controlled, such as in a high-pressure vessel. And it was considered that the application of a small amount of carbon-based toughener would be effective.
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#에폭시 수지 블록공중합체 CTBN 탄소나노튜브 나노다이아몬드
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