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摘要
The synthesis procedure for controlled-structure benzoxazine model oligomers is described. To understand the complex hydrogen bonding structure, a series of benzoxazine model oligomers is characterized by nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FT-IR). The NMR resonances for model oligomers are newly assigned. The FT-IR spectra for model benzoxazine oligomers are carefully investigated both in crystalline and solution states. The distribution of hydrogen bonding species in benzoxazine model oligomers is quantitatively analyzed using FT-IR spectra. The cyclic conformations for the oligomers are also proposed.
- 出版日期2003-6
