期刊
RSC ADVANCES
卷 8, 期 32, 页码 18038-18050出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra02033g
关键词
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资金
- National Natural Science Foundation of China (NSFC) [51603093, 21404050]
- Jiangsu Provincial Science and Technology Agency [BK20160515]
The influence of methylol and phenolic hydroxyl on the thermal properties of polybenzoxazines has been studied using two monofunctional benzoxazine monomers synthesized from para methylol-/ethyl-phenol, aniline and paraformaldehyde. The chemical structures of the synthesized monomers are confirmed by H-1 nuclear magnetic resonance (NMR), C-13 NMR and Fourier transform infrared spectroscopy (FT-IR). Polymerizations are monitored by differential scanning calorimetry (DSC). The glass transition temperature (T-g) of each polybenzoxazine is measured by DSC as well as dynamic mechanical analysis (DMA), indicating the greatly increased T-g via incorporation of methylol functionality into benzoxazine moiety. Monte Carlo simulations are also applied to further investigate the underlying structure-property relationship between intermolecular hydrogen-bonding network originating from different types of hydroxyl groups and thermal properties of polybenzoxazines. The agreement between the experimental and simulation results provide us with a fundamental understanding of the designing roles in highly thermally stable polybenzoxazines.
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