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Preparation of Dichlorocarbene Modified Butadiene Rubber and Its Thermal Properties
Author(s) -
Witinuntakit Tapanee,
Poompradub Sirilux
Publication year - 2015
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201400104
Subject(s) - dichlorocarbene , thermogravimetric analysis , chlorine , thermal stability , natural rubber , thermal decomposition , chloroform , materials science , fourier transform infrared spectroscopy , glass transition , nuclear chemistry , polymer chemistry , chemistry , organic chemistry , chemical engineering , composite material , polymer , engineering
Summary Dichlorocarbene 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 1 H‐ and 13 C‐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 (T g ) of DCBR (T g = −3.4 °C) was shifted to the higher temperature compared to T g value of BR (T g = −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.