Abstract
AbstractThe effects of a polycarbodiimide additive on the thermal stability of PBT are investigated using evolved gas analysis techniques. Measurements of the dynamic variations in sample‐cell pressure during PBT pyrolysis indicate that the maximum decomposition rate for the sample containing the additive is shifted to higher temperatures. The low‐temperature evolution of tetrahydrofuran (THF) and CO2 is significantly reduced, suggesting that stabilization is achieved by increasing polymer resistance to acid‐catalyzed hydrolysis. A condensed‐phase mechanism is indicated, since volatile species characteristic of the additive compound are not observed.
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