引用本文:
刘振海, 倪少儒, 刘淑敏, 陈仲庆, 唐学明. 双烯类聚合物的热分析Ⅱ.不同含1,2-含量无规聚丁二烯热(氧化)的研究[J]. 应用化学,
1985, 2(2): 39-42.
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.
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.
双烯类聚合物的热分析Ⅱ.不同含1,2-含量无规聚丁二烯热(氧化)的研究
摘要:
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。
English
THERMAL ANALYSIS OF POLY DIENES Ⅱ. A STUDY ON THERMO-OXIDATION OF THE RANDOM POLYBUTADIENES WITH DIFFERENT CONTENTS OF 1,2-UNITS
Abstract:
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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