Abstract
The thermolysis of polyethylene oxide (PEO) was investigated using the spin trap electron spin resonance technique. Based on the analysis of the formed carbon-center radicals, the PEO thermolysis was initiated at the heating temperature of 60 °C and accelerated from the temperature of 120 °C. Radical production depended on the heating temperature. Observations in this study show that there are two different reaction pathways: below 120 °C, the degradation of PEO was mainly initiated by hydroperoxide (ROOH) species, which may be produced by a high temperature manufacturing process; above 120 °C, the bond in the polymer molecule began to dissociate, leading to decomposition. A comprehensive thermal degradation mechanism of PEO is proposed based on experimental results. The findings from this study are applicable to various polymers produced using a high temperature manufacturing process.
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