Abstract
The curing and degradation behaviour of poly(phenylene sulphide) (PPS) and poly(2-methyl phenylene sulphide) (PMPS) in air and nitrogen has been studied. Curing studies have been made utilising assessment by solubility, indentation hardness, dynamic mechanical properties and heat of crystallisation studies. The results are critically discussed in terms of their ability to assess the degree of curing achieved. Degradation studies with product analysis by gas-liquid chromatography, infrared spectroscopy and chemical tests are reported and mechanisms of curing and degradation suggested and tested by studies on possible intermediates. The degradation behaviour of PMPS is complicated by oxidative and thermal reactions associated with the methyl substituent.
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