Abstract
Thermal decomposition of the copolymers of methyl methacrylate (MMA) with ethyl methacrylate (EMA) or n-butyl methacrylate (BMA) were investigated. The copolymers were obtained in a continuous stirred tank reactor (CSTR) using toluene and benzoyl peroxide, as solvent and initiator, respectively, at 80C. The volume was 1.2 litters and residence time was 3 hours. The thermal decomposition followed the second order kinetics for both MMA/EMA and MMA/BMA copolymers, which were almost in accordance with the order of copolymerization in a CSTR. The activation energies of thermal decomposition were in the ranges of 32-37 kcal/mol and 27-37 kcal/mole for MMA/EMA and MMA/BMA copolymers, respectively and a good additivity rule was observed against each composition for both copolymers. The thermogravimetric trace curve agreed well with the theoretical calculation.
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Abbreviations
- A:
-
pre-exponential factor [min−1]
- c:
-
degree of conversion [-]
- co :
-
initial degree of conversion [-]
- E:
-
apparent activation energy [kcal/mol]
- f:
-
mole fraction of MMA in copolymers [-]
- k:
-
rate constant [min−1]
- n:
-
apparent order of reaction [-]
- R:
-
gas constant [1.987 cal/(g·mole·K)]
- t:
-
time [min]
- T:
-
absolute temperature [K]
- To :
-
initial absolute temperature [K]
- β:
-
heating rate [°C /min]
References
Ogorkiewicz, R. H./ICL Ltd.: Engineering Properties of Thermoplastics, Wiley-Interscience, New York, p. 215 (1970).
Ray, W. H. and Laurence, R. L.: Polymerization Reactor Engineering in Chemical Reactor Theory, Amundson, N. R. and Lapidus, Eds., Prentice-Hall, Englewood Cliffs, NJ (1977).
Hamer. J. W., Akramov, T. A. and Ray, W. H..:Chem. Eng. Sci.,36, 1897(1981).
Das, S. and Rodriguez, F.:J. Appl. Poly. Sci.,32, 5981 (1986).
Das, S. and Rodriguez, F.:ibid.,39, 1309(1990).
Wittmer, P.:Macromol. Chem. Suppl., 3, 129(1979).
Shin, B. S. and Seul, S. D.:J. Chem. Eng.,10, 1 (1993).
Kissinger, H. E.:Anal. Chem.,21, 1702 (1957).
Freeman, E. S. and Carroll, B.:J. Polym. Sci.,62, 394 (1963).
Friedman, H. L.:ibid., Part C,6, 183 (1963).
Anderson, D. A. and Freeman, E. S.:ibid.,54, 253 (1961).
Ozawa, T.:Bull. Chem. Soc., Jpn.,38, 1881(1965).
Doyle, C.D.:J. Appl. Polym. Sci,5, 285(1961).
Duval, C:Anal. Chim. Acta,31, 301 (1964).
Newkirk, A.E.:Anal. Chem.,32, 1558(1960).
Lukaszewski, G. M. and Redfern, J. P.:Lab. Pract.,10, 469(1961).
Calahorra, E., Cortazar, M. and Guzuman, G. M.:J. Polym. Sci,23. 257 (1985).
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Shin, B.S., Seul, S.D. Thermal decomposition of copolymers of methyl methacrylate and alkyl methacrylates obtained from a CSTR. Korean J. Chem. Eng. 11, 74–80 (1994). https://doi.org/10.1007/BF02697358
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DOI: https://doi.org/10.1007/BF02697358