Abstract
In the present work thermogravimetric analysis (TGA) and differential thermal analysis (DTA) of selectively brominated polystyrene (PS) were carried out. The samples of PS were selectively brominated in the chain, on the ring, and also in both chain and ring. The effect of bromine content on the thermal stability was studied both in air and in inert atmosphere. Kinetic parameters of the degradation process (apparent activation energy, pre-exponential factor and order of reaction) were established using an efficient numerical procedure. Localization of bromine influenced the initial decomposition temperature (IDT) and the integral procedural decomposition temperature (IPDT). Samples containing bromine in the chain appeared to be the least stable. A possible explanation is given and mechanisms of degradation are suggested.
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