Self termination of ring opening reaction of<i>p</i>-substituted phenol-based benzoxazines: An obstructive effect<i>via</i>intramolecular hydrogen bond
The ringopening polymerizations of p-substituted phenol-basedbenzoxazines 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-
Dihydro-1,3-oxazine Derivatives and their Antitumor Activity
作者:J. B. Chylińska、T. Urbański、M. Mordarski
DOI:10.1021/jm00341a004
日期:1963.9
Effect of hydrogen bonds on the polymerization of benzoxazines: influence and control
作者:Yun Bai、Po Yang、Yan Song、Rongqi Zhu、Yi Gu
DOI:10.1039/c6ra08881c
日期:——
This work aims to disclose the reason that prohibited the preparation of highly crosslinked polybenzoxazines. Based on experimental study and computer simulations, we found that the dominant –OH⋯N hydrogen bond (Type I –OH⋯N hydrogen bond) of polybenzoxazines blocked high-degree polymerization and resulted in a low crosslink density by decreasing the charge densities of corresponding hydroxyl groups