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- W1979580010 abstract "R&D Center, Datwyler Korea, Inc., Daegu 704-833, Korea(Received April 28, 2014, Revised May 9, 2014, Accepted May 14, 2014)요 약：자동차 엔진 부품용으로 많이 사용되는 ACM 고무 샘플에 대하여 150℃, 160℃, 170℃, 및 180℃의 등온 상태에서 시간에 따른 압축영구줄음율(CS)과 열중량감소율을 측정하여 상관관계를 구하고, 이를 비등온 TGA를 이용하는 Toop의 해석방법에 이용하여 사용온도에서의 수명을 예측하고자 하였다. 노화촉진시험으로부터 측정된 중량감소율는 CS에 대하여 선형적으로 변화하는 것이 관찰되었으며, 이로부터 CS 40%에 이르는 시간을 재료의 수명시간으로 했을 때 중량감소에 의한 전환율은 4.2%로 나타났다. TGA 곡선으로부터 Flynn-Wall-Ozawa법에 의하여 전환율 4.2%에서의 활성화에너지는 120.2 kJ/mol로 계산되었으며, 이를 Toop의 해석법에 적용하였을 때의 예측수명은 사용온도 120℃에서 약 9,700 시간으로 계산되었다.ABSTRACTCompression set (CS) and weight loss by thermal degradation of the ACM rubber composite sample prepared for an automotive part were measured simultaneously at several given temperatures of 150, 160, 170, and 180. Using the relationship between them, thermal life of the sample could be predicted at a given operating temperature by applying Toops method which is based on the analysis of non-isothermal TGA thermograms. Conversion by weight loss showed a linear relationship with CS changes, exhibiting 4.2% at CS 40%. Activation energy of thermal degradation was calculated as 120.2 kJ/mol at 4.2% of weight loss from Flynn-Wall-Ozawa analysis. When the expected life was set as time to reach CS 40% at 120, the life time of the sample was calculated as 9,700 hrs when Toops method was applied.KeywordsACM rubber, toop method, TGA, life time prediction" @default.
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- W1979580010 date "2014-06-30" @default.
- W1979580010 modified "2023-09-24" @default.
- W1979580010 title "A Study on Life Time Prediction of ACM Rubber Composite Using Accelerated Test and Thermogravimetric Analysis" @default.
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- W1979580010 doi "https://doi.org/10.7473/ec.2014.49.2.144" @default.
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