The results showed the thermal stability of POM could be improved remarkably by applying triethanolamine as amine treating agent through melting processing, and the optimum content of triethanolamine was 0.2%.

• 结果表明：以三乙醇胺为胺处理剂、采用熔融后处理法可有效提高聚甲醛热稳定性能，三乙醇胺最佳用量为0.；2%25。