Studies on Polymerization and Depolymerization of ε-Caprolactam Polymer. IX. Reformation Reaction of ε-Caprolactam from Poly-ε-capramide
Studies on Polymerization and Depolymerization of ε-Caprolactam Polymer. IX. Reformation Reaction of ε-Caprolactam from Poly-ε-capramide
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ε-己内酰胺聚合物的聚合和解聚研究 IX。
DOI：
10.1246/bcsj.34.1201
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发表时间：
1961
影响因子：
4
通讯作者：
N. Ogata
中科院分区：
文献类型：
--
作者：
N. Ogata
研究了端基改性聚ε-癸酰胺转化为ε-己内酰胺的反应。发现在230°C下没有e-己内酰胺从其所有端基为-COONa或-NHAc基团的聚合物重整，而e-己内酰胺在257°C下缓慢重整。在257°C下，从具有-COONa或-NHAc端基的聚合物重整e-己内酰胺的速率为从具有正常端基的聚合物重整e-己内酰胺的速率的约1/10，并且其与聚合物的聚合度无关。ε-己内酰胺聚合物的聚合和解聚反应主要发生在端基上，聚合物链中两个相邻酰胺基团之间的交换反应缓慢发生。
The reformation reaction of e-caprolactam from poly-e-capramide having modified end-groups has been studied. It was found that no e-caprolactam was reformed at 230°C from the polymer of which all of the end-groups were –COONa or –NHAc groups, while e-caprolactam was reformed slowly at 257°C. The rate of the reformation of e-caprolactam from the polymer having –COONa or –NHAc end-groups is about 1/10 of that from the polymer having normal end-groups at 257°C and it is independent of the polymerization degree of the polymer. The polymerization and the depolymerization reactions of e-caprolactam polymer occur predominantly on the end-groups and the interchange reaction between two adjacent amide groups in the polymer chain occurs slowly.