Polyphenylene sulfide thermal degradation

When polyphenylene sulfide Is heated In air at approximately 815°C, the major components of thermal degradation are hydrogen, methane, carbon monoxide, carbon dioxide and carbonyl sulfide. 

Other polymers that have been examined by EGA include PVC [124-126], PS [127-130], styrene-acrylonitrile copolymers [131-133], PE and PP [134-139], polyacrylates and copolymers [140-143], and PET, polyphenylenes, and polyphenylene oxides and sulfides [143-148]. Studies involving the nse of chromatography include the thermal degradation of PVC [149], vinyl plastics [150], and polysnlfone [151]. 

Weight loss and sulfurous gas emission during thermal-oxidative degradation of 600 mg polyphenylene sulfide (1 wt.% U2CO3 as adsorbent for sulfurous compounds) [626]... 

High-temperature thermoplastics, such as polysulfone, polyether sulfone, polyphenylene sulfide, polyether imide, polyaryl ether ketone, and polyphenylene ether are processed at high temperatures (some above 300 °C). Here, the limit of pyrolysis is almost reached. Degradation and cross-linking as well as discoloration can occur thermal-oxidative and thermal-mechanical degradation under processing conditions have not been sufficiently investigated [38]. 

Polyphenylene sulfide (PPS) is extremely resistant to thermal-oxidative degradation. It is assumed that a radical-cationic mechanism is responsible for thermal-oxidative degradation of PPS in air. It explains some of the identified degradation products, such as hi-, ter-, and quaternary phenyls as well as oxygen integration in the phenoxy. However, there is still no explanation for the naphthalene products formed during degradation [573],... 

Budgell and co-workers [53] studied the thermal degradation of polyphenylene sulfide (PPS) over a range of pyrolysis temperatures by flash Py-GC-MS. At the lower pyrolysis temperatures (up to about 550 °C) the major volatile products were... 

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