ESR Studies on the Molecular Mechanisms of Fracture of Polymers at Low Temperatures
ESR Studies on the Molecular Mechanisms of Fracture of Polymers at Low Temperatures
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聚合物低温断裂分子机制的ESR研究
DOI：
10.1295/polymj.5.135
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发表时间：
1973
期刊：
影响因子：
2.8
通讯作者：
J. Sohma
中科院分区：
文献类型：
--
作者：
T. Kawashima;S. Shimada;H. Kashiwabara;J. Sohma
从观察到的ESR谱从机械断裂的聚合物，如PE，PP，PTFE，和PMMA，自由基物种进行了鉴定。发现聚合物断裂产生的自由基是碳链断裂形成的自由基。由聚合物的机械断裂产生的自由基的其他特征被发现是与氧的高反应性和在衰变过程中的一些异常行为。根据电子自旋共振（ESR）观察所确定的事实，讨论了聚合物断裂的分子机理。
From the ESR spectra observed from the mechanically-fractured polymers, such as PE, PP, PTFE, and PMMA, the radical species were identified. It was found that the radicals produced by the fracture of the polymers are the radicals formed from the scission of the carbon chains. Other characteristics of the radicals produced by the mechanical fracture of the polymer were found to be a high reactivity with oxygen and some anomalous behavior in the decay process. The molecular mechanisms of the fracture of the polymers were discussed on the basis of the facts established by ESR observation.