Abstract
The products of the thermal degradation of copolymers of methyl acrylate (MA) with 2,3-dibromopropyl methacrylate (2,3-DBPM) and 2,3-dibromopropyl acrylate (2,3-DBPA) have been analysed quantitatively using thermal analysis, infra-red spectroscopy, mass spectrometry and gas-liquid chromatography. The dominant products from the first of these systems are 2,3-DBPM monomer and chain fragments reflecting the behaviours of the homopolymers of 2,3-DBPM and MA, respectively. The yield of methyl bromide is at a maximum when the proportion of interunit bonds between the two monomers is at a maximum. From the second system, the dominant products are methyl bromide and the chain fragment or cold ring fraction. The mechanisms by which these and the many other products are formed are discussed with reference to related systems which have been studied previously.
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