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A C-13-NMR ANALYSIS METHOD FOR PHENOL-FORMALDEHYDE RESIN STRENGTH AND FORMALDEHYDE EMISSION

机译:酚醛树脂强度和甲醛释放量的C-13-NMR分析方法

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摘要

A method based on the use of C-13-NMR relative peak intensity ratios for different characteristic chemical groups, known or supposed to contribute to phenol-formaldehyde (PF) resin strength and formaldehyde emission is presented. The method relates results obtained by C-13-NMR analysis of liquid PF resins with the strength and formaldehyde emission in the resin-hardened state. Correlation of different peak ratios with experimental results allows the proposal of equations relating the sum of different C-13-NMR peak ratios with the two mentioned physical properties of the same resins in their hardened state. The equations presented appear to have some applied value in predicting physical properties of hardened industrial-type PF resins from a single C-13-NMR spectrum of the original liquid resin, as well as to render easier comparison between different PF resin formulations. (C) 1995 John Wiley and Sons, Inc. [References: 13]
机译:提出了一种基于对不同特征化学基团使用C-13-NMR相对峰强度比的方法,该方法已知或被认为有助于酚醛(PF)树脂强度和甲醛释放。该方法涉及通过液态PF树脂的C-13-NMR分析获得的结果与树脂硬化状态下的强度和甲醛释放量。将不同的峰比率与实验结果相关联,可以提出方程式,将不同的C-13-NMR峰比率之和与上述两种处于硬化状态的相同树脂的物理性质联系起来。提出的方程式在从原始液态树脂的单个C-13-NMR光谱预测硬化的工业型PF树脂的物理性能中似乎具有一定的应用价值,并使不同的PF树脂配方之间的比较更加容易。 (C)1995 John Wiley and Sons,Inc. [参考:13]

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