A new radical-Lewis acid system has been discovered to achieve the ring-opening polymerization of tetrahydrofuran. Different types of reaction mechanisms were discovered for the initiation and polymerization processes. The proposed initiation mechanism was studied by MALDI-TOF and ESI-MS as a radical substitution mechanism and polymerization was a coordination-insertion mechanism. And polytetrahydrofuran with high molecular weight ( = 14.6 × 10 g mol) and narrow molecular weight distribution (PDI = 1.44) could be obtained.

中文翻译：

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具有自由基取代机制的四氢呋喃开环聚合的新自由基引发

发现了一种新的自由基-路易斯酸体系来实现四氢呋喃的开环聚合。发现了引发和聚合过程的不同类型的反应机制。通过MALDI-TOF和ESI-MS研究提出的引发机制为自由基取代机制，聚合为配位插入机制。可以得到高分子量（=14.6×10g·mol）和窄分子量分布（PDI=1.44）的聚四氢呋喃。