酚树脂和塑料是原始的热硬化性合成材料。

The phenol resins and plastics were the original synthetic thermosetting materials.

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通过实验得到了绝缘树脂的热老化性能参数，如温度指数等，验证了绝缘树脂耐热等级的可靠性。

Then the properties parameters, such as temperature index, are gotten by experiment. The reliability of insulation resin with heat-resistant class is verified.

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探讨了甲醇对酸性树脂催化剂物化性能和催化性能的影响。

Effects of methanol on the properties and catalytic activity of resin etherification catalysts were studied.

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