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 등온법등이다. 이 방법중 Freeman-Carroll법을 제외하고는 활성화에너지는 43∼56Kcal/㏖이었으며, 문헨치와 잘 일치하였다. 또한 PMMA의 열분해는 미분중량분석에 의해 단량체로 분해되고 다순한 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/㏖ and 56 Kcal/㏖ except Freeman-Carroll method, and this range agrees with the value of reference very well.