New Study of Caprolactam Decomposition Phenomenon under High Temperature during Hydrolysis Polymerization Process
During the caprolactam hydrolysis polymerization process under high pressure, the temperature of the caprolactam pre-heater must set higher than 240 °C to assure the reactants including caprolactam and oligomers especially cyclic dimmer take part in ring-opening reaction smoothly, however, decomposition reaction occurs in the pre-heater, ammonia and other by-products are produced at too high temperature. Further study of FT-IR proved almost all the characteristic absorption peaks of Nylon 6 had shifted to a lower wave number side. After repeatedly adjusting the temperature of the first and the second caprolactam pre-heater, the reason for caprolactam decomposition under high temperature was ascertained and a suitable way to prevent such decomposition phenomenon was found.
caprolactam Nylon 6 polymerization pre-heater decomposition ammonia ring-opening
Chunwang Yi Chaosheng Wang Huaping Wang
State Key Laboratory of Modification of Fiber and Polymer Materials, Donghua University, Shanghai 201620, P.R.China
国际会议
上海
英文
836-841
2009-05-27（万方平台首次上网日期，不代表论文的发表时间）