Citation:
Liu Zhenhai, Ni Shaoru, Liu Shumin, Chen Zhongqing, Tang Xueming. THERMAL ANALYSIS OF POLY DIENES Ⅱ. A STUDY ON THERMO-OXIDATION OF THE RANDOM POLYBUTADIENES WITH DIFFERENT CONTENTS OF 1,2-UNITS[J]. Chinese Journal of Applied Chemistry,
;1985, 2(2): 39-42.
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The study on thermo-oxidation behavior of polybutadienes with different contents of 1,2-units shows that the thermo-oxidation reaction takes place more easily at the doble bond in the main chain than in the side vinyl group of polybutadiene,as being attributed to having more α-H's in the former case. Based on the thermo-oxidation temperature and apparent activation energy E, it has been concluded that the syndiotactic 1,2-poly-butadiene with high vinyl content synthesized on the cobolt catalyst system is more stable than that obtained with molybdenum catalyst system. The E of the former is more than 150kJ/mol, but -100kJ/mol for the latter. The variation is considered due to the difference in macromolecular aggregatoin.
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