Abstract
Thermoluminescence was studied above room temperature for polyoxymethylene samples with various morphologies. As expected, the appearance of the luminescence glow curve was different between samples in both shape and intensity, reflecting the difference in crystalline perfection: needle-like and fibrillar crystals, with extended-chain structures, showed a sharp and strong glow peak around their melting temperatures whereas a broad glow maximum appearing above crystalline dispersion temperature was predominant for folded-chain crystals. The results are discussed in comparison with those of differential scanning calorimetry/thermograviometry and other physical measurements.
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