The Technology of Phenol‐Formaldehyde Moulding Powders 1 ‐ Characterisation of Novolak Resins and Derived Moulding Powders

British Polymer Journal Pub Date : 1986-05-01 DOI:10.1002/PI.4980180303

A. Birley, Arthur Blinkhorn

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Abstract

This research programme has been concerned with the technology of phenol-formaldehyde resins and of moulding powders based on them. This paper reports the characterisation of the prepolymer (Novolak) and concentrates on the results obtained by gel permeation chromatography with an infrared detector. A variety of frequencies have been employed, corresponding to different components in the resin, and the best separation was obtained by monitoring the phenolic hydroxyl at 3400 cm−1. It has been concluded that both commercial Novolak and prepolymer extracted from moulding powder contain a substantial fraction of high molecular weight material.

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酚醛模塑粉技术1——Novolak树脂及其衍生模塑粉的表征

本研究项目涉及酚醛树脂及其成型粉末的技术。本文报道了预聚物(Novolak)的表征，并重点介绍了用红外探测器凝胶渗透色谱法得到的结果。采用了不同的频率，对应于树脂中的不同组分，在3400 cm−1时监测酚羟基获得了最佳分离效果。结果表明，从成型粉末中提取的预聚物和商用Novolak均含有相当一部分高分子量材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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British Polymer Journal

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