The change in crosslinking density showed a trend of increasing and then decreasing, and after 160 d of aging, the proportion of P c had decreased by about 24.82%, the proportion of P f had decreased by about 14.67%, and the proportion of P d had increased by about 21.38%.
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Research on the Thermal Aging Performance of a GAP-Based Polyurethane Elastomer.
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The sentences
With the high-temperature aging, the thermal decomposition characteristics of the samples showed an obvious change trend, and the activation energy of the oxidation reaction showed a decreasing trend.