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Non-isothermal Degradation Analysis of Plywood and Determination of Kinetic Parameters Using Coats–Redfern Method

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Abstract

Thermogravimetry analyzer was used for the study of thermal degradation of plywood under air and nitrogen environment. The investigation was carried out at a heating rate in the range of 5–100 K min−1 from a temperature atmosphere to 1050 K. Thermal decomposition steps dehydration, oxidative reaction (air environment), pyrolysis degradation (nitrogen environment) and char degradation with temperature evolution were reported. Kinetic parameters of thermal degradation step were investigated with model fitting Coats–Redfern method. Arrhenius kinetic reaction model was used for oxidative and pyrolysis reaction degradation stages kinetic parameter estimation. Model kinetic triplets were estimated for different heating rates of the thermal degradation step. The experimental data deviation percentage with the proposed model was found to be below 5% with reasonable accuracy for different heating rates.

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Abbreviations

m :

Mass initial and mass at a time (mg)

t :

Time (s)

W :

Normalized mass

α :

Conversion

T :

Temperature (K)

dα/dt :

Conversion rate

dW/dt :

Normalized DTG (s−1)

dm/dt :

Experimental DTG data (mg s−1)

K(T):

Reaction rate constant (s)

f(α):

Reaction model

A :

Pre-exponential factor (s−1)

R :

Gas constant, 8.314 (J mol−1 K−1)

n :

Reaction order

β :

Heating rate (K min−1)

g(α):

Reaction model integral form

N :

Number of data points

E :

Activation energy (J mol−1)

o :

Initial

f :

Final

exp:

Experimental

theo:

Theoretical

i :

Different heating rate values

TGA:

Thermogravimetry analysis

DTG:

Differential thermogravimetry

FTIR:

Fourier-transform infrared spectroscopy

RMSD:

Root-mean-square deviation

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Acknowledgements

The authors would like to acknowledge CSIR-Central Building Research Institute, Roorkee, India, for financial support and permission for the activity.

Funding

Funding was provided by Council of Scientific and Industrial Research, India (Grant No. HCP-17).

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Authors and Affiliations

  1. Fire Research Division, CSIR-Central Building Research Institute, Roorkee, Haridwar Distt, Uttarakhand, 247667, India

    A. Aravind Kumar, Rajiv Kumar, A. A. Ansari & Rakesh Kumar

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  1. A. Aravind Kumar
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  2. Rajiv Kumar
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Correspondence to A. Aravind Kumar.

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Kumar, A.A., Kumar, R., Ansari, A.A. et al. Non-isothermal Degradation Analysis of Plywood and Determination of Kinetic Parameters Using Coats–Redfern Method. J. Inst. Eng. India Ser. E 102, 249–255 (2021). https://doi.org/10.1007/s40034-021-00215-3

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