It was shown that the curing process of resoles, at first, proceeded by condensation reaction of methylol groups, and the formation of dimethylene ether linkage was predominant.

结果表明热固性酚醛树脂的固化过程，首先是羟甲基发生缩合反应，缩合反应形成醚键是主要的。

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The results indicated that the thermal stability of phenol-formaldehyde resin was related to the presence of dimethylene ether linkage. The thermal stability decreased as the ether linkage increased.

结果表明酚醛树脂的热稳定性与二亚甲基醚键的存在很有关系，随着醚键的增多而热稳定性降低。

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