It may be that there is not the hydroxyl group and can not form intermolecular hydrogen bond with MB-Hb system in the cyclohexane. 这也许是因为其不含有而不能与体系形成分子间氢键所导致的。
The contained amino group and hydroxyl group in black dyes can form hydrogen bond with Si-OH group contained in polar silica gel. 硅凝胶是一种极性溶剂,含有大量Si-OH基,可以与黑色染料结构中含有的氨基和羟基相互之间形成氢键。
PCL and PVC reacted and a hydroxyl bond created. And as its low Tg, this do good for improving the shape memory properties at 60 ℃; PCL的加入,可以和PVC相互作用生成氢键,以及由于其本身玻璃化温度很低(-60℃),从而可以很好的降低材料的软化点,从而改善材料在60℃时的形状记忆性能;
PVA is a linear polymer with a lot of hydroxyl groups, the hydroxyl groups can form intra-molecular and intermolecular hydrogen bond, which makes the melting temperature of PVA higher than its decomposing temperature, so melt process of pure PVA is difficult. 聚乙烯醇(PVA)是一种含有大量羟基的线形大分子聚合物,羟基能形成大量的分子内和分子间氢键,使纯PVA的熔融温度高于其分解温度,使其难以熔融加工。
The results of calculation confirm the formation of rather strong hydrogen bonds between isonitriles and hydroxyl compounds, as indicated by experimental evidences. The calculated hydrogen bond energies vary with the same tend as the red shift of IR spectra of the OH bonds. 计算结果指出,异腈与羟基化合物之间可以形成相当强的氢键,该体系氢键键能的减弱与OH键的伸缩振动红外光谱的红移有明显的平行关系。
Every powder sample of polyurethane ligand and its chromium complex were characterized by FTIR, 13 C-NMR and DSC spectra. These spectra proved that the hydroxyl bridged coordination bond between COO-of polyurethane ligand and Cr 3+ ion existed. 每种聚氨酯配体与其含铬配合物粉末样品都经过FTIR,13C-NMR和DSC等手段表征,表征结果证明:聚氨酯配体链上的-COO-与水中Cr3+之间存在羟基桥式配位。
It was concluded that a small composite particle with narrow distribution could be obtained, by decreasing the hydrogen bond force among acrylic hydroxyl chains and increasing the hydrogen bond force between acrylic hydroxyl chain and HDI biuret. 降低聚丙烯酸链间的氢键作用力,增加羟基和HDI缩二脲间的氢键作用力,能获得粒径小而均匀的包覆粒子。
The result shows that the hydroxyl groups of alditol and water molecules coordinate to Tb 3+ ion together while the hydroxyl groups of alditol, water molecules and chloride ions form an extensive hydrogen bond network. 结果表明,糖的羟基和水分子同时与稀土离子配位,糖的羟基、水分子及氯离子之间形成广泛的氢键网络。
By detecting fermentation products, it was found that its structure was similar with PVA, but the amount of hydroxyl groups was low and a new type of chemical bond ( C-O-C) was formed. 通过检测发酵产物,发现它的结构和PVA类似,但它的羟基含量较少,并且其中含有C-O-C化学键。
The TiO2 nanoparticles showed efficient adsorption property toward metal ions because of its small size, big specific surface area and a lot of hydroxyl group, which could bond with metal ions. 纳米Ti02由于粒径小、比表面积大,表面存在大量羟基能够和阳离子键合,对金属离子表现出较强的吸附能力,是一种有着巨大应用前景的吸附材料。