Self termination of ring opening reaction of<i>p</i>-substituted phenol-based benzoxazines: An obstructive effect<i>via</i>intramolecular hydrogen bond
作者:Suwabun Chirachanchai、Apirat Laobuthee、Suttinun Phongtamrug
DOI:10.1002/jhet.130
日期:2009.7
The ring opening polymerizations of p-substituted phenol-based benzoxazines are self-terminated as soon as dimers form. The polymerization of benzoxazine monomers does not proceed according to the theoretical mechanism even though the conditions, temperature, molar ratio, solvent polarity, and reactant ratio are varied. The speculated mechanism, involving the unique structure of a dimer with inter-
所述开环 聚合的p -取代酚系苯并恶嗪是自终止,一旦二聚体形成。该聚合的即使条件,温度,摩尔比,溶剂极性和反应物比率变化,苯并恶嗪单体也不会根据理论机理进行。推测的机理涉及具有分子间和分子内氢键的二聚体的独特结构,用于解释对开环聚合的阻碍作用。在本文中,我们阐明了化合物的立体结构控制反应并阻止理论机理所预期的聚合的重要情况。J.杂环化学,(2009)。