Abstract
The thermooxidative degradation of chlorinated natural rubber (CNR) from latex were studied by thermogravimetry (TG) coupled with Fourier Transform Infrared Spectroscopy (FTIR), ultraviolet-visible (UV-Vis) spectroscopy and difference FTIR. The CNR degraded in air atmosphere with two distinct steps of weight loss. The first step ranging from 160 to 390 °C, mainly is a dehydrochlorination reaction with a little oxidative scission of molecular backbones to release carbon dioxide and the conjugated polyene sequences ([CC]) n=3,4 are formed on the molecules of CNR. The second step ranging from 390 to 585 °C, is an oxidative degradation reaction of the molecular backbones of CNR and the evolved gas is only carbon dioxide.
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