Abstract
SummaryDichlorocarbene modified butadiene rubber (DCBR) was prepared from butadiene rubber (BR) via an alkali hydrolysis of chloroform with using cetyltrimetylammonium bromide (CTAB) as a phase transfer agent. The chemical structure of DCBR was characterized by a fourier transform infrared spectroscopy and 1H‐ and 13C‐nuclear magnetic resonance spectroscopy. The chlorine content in DCBR matrix was extracted by acid digestion method and estimated based on a volhard method. The chlorine content of DCBR increased with the increase of reaction time. The glass transition temperature (Tg) of DCBR (Tg = −3.4 °C) was shifted to the higher temperature compared to Tg value of BR (Tg = −102.8 °C) due to the presence of dichlorocarbene group. Moreover, thermogravimetric analysis was used to study the decomposition profile of BR and DCBR. The thermal stability of DCBR was decreased compared to that of BR, while the flame retardant of NR/DCBR blend was improved due to the presence of chlorine in DCBR. The chlorine char from dichlorocarbene group acted as a thermal insulator for rubber.
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