Application of a calorimetric method in radiation-induced polymerization—III : Determination of propagation and termination rate constants for n-butyl methacrylate

A study on the polymerization of n-butyl methacrylate has been performed using ⁶⁰COγ-rays. The kinetics were followed by a calorimetric method already used with methyl- and ethyl-methacrylate. In this case also, the rate of polymerization was found to be proportional to (dose rate)${}^{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}$ over wide ranges of dose rate and temperature.Rate constants for propagation and termination steps have been determined; the results agree with those for the other monomers and with literature data.