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Citation: Hong Zheng, Xin Peng, Chunwang Yi. The Tale of Caprolactam Cyclic Oligomers: The Ever-changing Life of “Princess Cyclo”[J]. University Chemistry, ;2024, 39(9): 40-47. doi: 10.12461/PKU.DXHX202403058 shu

The Tale of Caprolactam Cyclic Oligomers: The Ever-changing Life of “Princess Cyclo”

College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410000, China

Received Date: 18 March 2024
Revised Date: 16 April 2024

During the hydrolysis process of caprolactam to produce polyamide 6, a considerable number of cyclic oligomers are inevitably formed. Among these, the cyclic dimer, with its propensity for aggregation, poses significant challenges to both process safety and product quality. Thus, understanding the characteristics of cyclic oligomers is crucial for ensuring process safety and enhancing product quality. This paper employs a personification approach to vividly describe the properties of cyclic oligomers, elucidating the formation mechanism of cyclic dimers, delineating the behavior of crystal phase transitions, and highlighting the detrimental effects of cyclic dimers on industrial production. Moreover, it proposes methods for process optimization.
- Caprolactam cyclic oligomer,
- Cyclic dimer,
- Crystal phase transformation,
- Performance,
- Industrial impact
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The Tale of Caprolactam Cyclic Oligomers: The Ever-changing Life of “Princess Cyclo”

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com