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유리섬유와 세라믹섬유가 혼합된 실리콘계 탄성체의 삭마 특성 연구
이범철(Beomcheol Lee),이동훈(Donghoon Lee),이용준(Youngjun Lee),고승원(Seungwon Ko),현진호(Jinho Hyon) 한국추진공학회 2023 한국추진공학회지 Vol.27 No.4
In this study, the characteristics of glass and ceramic fiber were investigated based on silicone rubber matrix which exhibits excellent heat resistance. The ablation performance of these materials was compared with that of EPDM (Ethylene-Propylene Diene Monomer) composite materials currently used in solid rocket motors, through high temperature ablation testing. A composition that included 2 phr and 12 phr of glass fibers and ceramic fibers, respectively, underwent evaluation, and the results showed that the addition of ceramic fibers improved the material’s ablation performance compared to EPDM composite materials currently in use.
이범철,유길상 한국고무학회 1997 엘라스토머 및 콤포지트 Vol.32 No.1
The change of elastic modulus(E'), loss modulus(E$quot;), and loss tangent(tanδ) were investigated on condition of double strain amplitude (DSA) at temperature of -40∼80℃for carbon black filled natural rubber. E', E$quot;, and tanδ were increased as it closed to the glass transition temperature due to decrease of rubber network flexibility and carbon black agglomerate interaction. In the micro strain range, energy loss showed maximum value because of the chain slippage in rubber matrix, but the regeneration of carbon black agglomerate and rubber matrix affected decrease of energy loss over the mid-range strain. As a results of regression analysis, E'_(max) correlation with ΔE' (E'_(0.4%DSA)-E' _(2.0%DSA)) showed linear relationship.