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不同1,2-含量无规聚丁二烯的研究表明,与侧链乙烯基相比,主链双键更易于发生热氧化反应,这可能因其含有较多的a-氢。根据热氧化温度和动力学参数活化能E,钴系高1,2-含量间规聚丁二烯比之钼(或锂)系聚丁二烯更为稳定,前者E值高达150kJ/mol以上,后者为100kJ/mol左右。热交联表观活化能分别为181、166kJ/mol。它们热氧化稳定性的差别,是由于通常钴系聚合物为晶态,锂(或钼)系为非晶态。
Studies on different random 1,2-content polybutadiene show that the main chain double bond is more susceptible to thermal oxidation reaction than the side chain vinyl, probably because it contains more a-hydrogen. According to the thermal oxidation temperature and the activation energy E of kinetic parameters, the syndiotactic polybutadiene in the high content of cobalt is more stable than the molybdenum (or lithium) polybutadiene, the former E value is as high as 150 kJ / mol , The latter is about 100kJ / mol. The apparent activation energy of thermal crosslinking were 181,166kJ / mol respectively. The difference in their thermal oxidation stability is due to the fact that the cobalt-based polymer is usually crystalline and the lithium (or molybdenum) is amorphous.