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열 중량법에 의한 고분자 물질의 열화에 관한 연구
Thermal Degradation of Polymer Material by Thermogravimetry-A kinetic data analysis of poly(methyl methacrylate)-
HWAHAK KONGHAK, April 1985, 23(2), 125-136(12), NONE
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Abstract
Poly（methyl methacrylate）을 가열속도 1 ℃/min에서 20 ℃/min, 가열온도 320 ℃에서 370 ℃범위까지 질소기류하에 열분해를 행하여 열분해곡선으로부터 활성화에너지를 구하였다.
활성화에너지를 구하기 위하여 사용된 방법은 Kissinger, Freeman-Carroll, Chatterjee-Conrad, Friedman, Horowitz-Metzger, Coats-Redfern, Ozawa 및 등온법 등이다. 이 방법중 Freeman-Carroll법을 제외하고는 활성화에너지는 43∼56 Kcal/mol이었으며, 문헌치와 잘 일치하였다.
또한 PMMA의 열분해는 미분중량분석에 의해 단량체로 분해되고 단순한 분해반응임을 확인하였다.
활성화에너지를 구하기 위하여 사용된 방법은 Kissinger, Freeman-Carroll, Chatterjee-Conrad, Friedman, Horowitz-Metzger, Coats-Redfern, Ozawa 및 등온법 등이다. 이 방법중 Freeman-Carroll법을 제외하고는 활성화에너지는 43∼56 Kcal/mol이었으며, 문헌치와 잘 일치하였다.
또한 PMMA의 열분해는 미분중량분석에 의해 단량체로 분해되고 단순한 분해반응임을 확인하였다.
The thermal decomposition of poly（methyl methacrylate）(PMMA) has been studied using a conventional dynamic thermogravimetric technique in a flowing nitrogen gas at several heating rates between 1 ℃/min and 20 ℃/min, and at several heating temperatures between 320 ℃ and 370 ℃．
The degradation was found to be a single process composed of monomer of PMMA as products. The mathematical techniques used for calculation of activation energy are Kissinger, Freeman-Carroll, Chatterjee-Conrad, Friedman, Horowitz-Metzger, Coats-Redfern, Ozawa and Isothermal method. The range of activation energy obtained using the several techniques is between 43 Kcal/mol and 56 Kcal/mol except Freeman-Carroll method, and this range agrees with the value of reference very well.
The degradation was found to be a single process composed of monomer of PMMA as products. The mathematical techniques used for calculation of activation energy are Kissinger, Freeman-Carroll, Chatterjee-Conrad, Friedman, Horowitz-Metzger, Coats-Redfern, Ozawa and Isothermal method. The range of activation energy obtained using the several techniques is between 43 Kcal/mol and 56 Kcal/mol except Freeman-Carroll method, and this range agrees with the value of reference very well.
