State Key Laboratory of Chemistry Engineering, East China University of Science and Technology, Shanghai, People's Republic of China, 200237.
Langmuir. 2013 Jan 8;29(1):411-6. doi: 10.1021/la303730m. Epub 2012 Dec 26.
A series of low surface free energy silane-functional polybenzoxazine films were prepared from alkylphenol, paraformaldehyde, and 3-aminopropyltrimethoxysilane (3-APTMOS) using a facile one-step thermal curing method. The chemical structures of these benzoxazine monomers were confirmed by FTIR and (1)H NMR. The surface properties of the series of polybenzoxazine films were proved through contact angle measurement, and the lowest surface energy of these films was 14.91 mJ/m(2). Moreover, the hydrogen bond network of the polybenzoxazine systems was studied using the FTIR spectra. The result showed that the intramolecular hydrogen bonding transformed into intermolecular hydrogen bonding with increasing curing time. Based on these findings, the transformation mechanism between the intermolecular and intramolecular hydrogen bonding during the progress of curing was proposed. The thermogravimetric analysis (TGA) results indicated that the silane-functional polybenzoxazine, with a high char yield of 57.01%, possessed excellent thermal stability.
采用一步热固化法，由烷基酚、多聚甲醛和 3-氨丙基三甲氧基硅烷（3-APTMOS）制备了一系列低表面自由能的硅烷官能化聚苯并恶嗪薄膜。通过傅里叶变换红外光谱（FTIR）和（1）H 核磁共振（NMR）确认了这些苯并恶嗪单体的化学结构。通过接触角测量证明了一系列聚苯并恶嗪薄膜的表面性能，这些薄膜的最低表面能为 14.91 mJ/m²。此外，还通过傅里叶变换红外光谱（FTIR）研究了聚苯并恶嗪体系中的氢键网络。结果表明，随着固化时间的增加，分子内氢键转化为分子间氢键。基于这些发现，提出了在固化过程中氢键从分子内到分子间转化的机理。热重分析（TGA）结果表明，具有 57.01%高残炭率的硅烷官能化聚苯并恶嗪具有优异的热稳定性。
