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首页> 外文期刊>Journal of Applied Polymer Science >Addition of H3PO4 to diglycidyl ethers of bisphenol A: Kinetics and product structure
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Addition of H3PO4 to diglycidyl ethers of bisphenol A: Kinetics and product structure

机译：将H3PO4加至双酚A的二缩水甘油醚中：动力学和产物结构

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摘要

The preparation of the addition products of H3PO4 to bisphenol A based epoxy resins is described. These products are considered modifiers of the epoxy resins and for the further formation of useful networks (coatings and related products). Depending on the ratio of H3PO4 to epoxy groups and other reaction variables, a family of oligomers with acidic end groups has been formed. The major reaction is the addition of H3PO4 to epoxy groups. Among the side reactions, the acid-catalyzed addition of the >CH-OH (and/or -CH2OH) groups to epoxy groups dominates. The -OH groups, if not present in the starting resins, are emerging from the P-OH to oxirane ring addition. The matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analysis of the starting epoxy resins has revealed their structural diversity. In the kinetic measurements and determination of the ester composition, diglycidyl ether of bisphenol A (BADE) as a model compound has been mostly applied. The kinetics of the H3PO4-BADE reaction is described, and the structures of the final products are analyzed with P-31{H-1}-NMR, which gives (at pH similar to 12) quantitatively the proportions of the monoesters, diesters, and triesters as well as the unreacted H3PO4. The conditions have been found leading exclusively to the monoester, and this indicates that an increase in the reaction temperature enhances the selectivity of the reaction; that is, it depresses the proportion of the acid-catalyzed -OH and epoxy group reaction. (C) 2007 Wiley Periodicals, Inc.
机译：描述了H 3 PO 4与双酚A基环氧树脂的加成产物的制备。这些产品被认为是环氧树脂的改性剂，用于进一步形成有用的网络（涂料和相关产品）。取决于H 3 PO 4与环氧基的比例和其他反应变量，已经形成了具有酸性端基的低聚物家族。主要反应是将H3PO4加到环氧基上。在副反应中，＞ CH-OH（和/或-CH 2 OH）基团在环氧基上的酸催化加成占主导。 -OH基团，如果不存在于起始树脂中，则是从P-OH到环氧乙烷环加成中出现的。起始环氧树脂的基质辅助激光解吸/电离飞行时间质谱分析揭示了它们的结构多样性。在动力学测量和酯组成的确定中，双酚A的二缩水甘油醚（BADE）作为模型化合物已被广泛使用。描述了H3PO4-BADE反应的动力学，并使用P-31 {H-1} -NMR分析了最终产物的结构，该结构可在pH值接近12时定量给出单酯，二酯，以及三酯和未反应的H3PO4。已经发现仅导致单酯的条件，这表明反应温度的升高提高了反应的选择性。即，它降低了酸催化的-OH和环氧基反应的比例。 （C）2007 Wiley期刊公司

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