发布时间:2025-02-01 04:41:44
甲醛水溶液中有环状聚合物。刚生产出来的甲醛水溶液静置时会自动生成低分子聚合物,形成聚氧甲烯基醇的混合物,同时部份出现沉淀。甲醛易氧化,聚合,其浓溶液在室温下长期放置就能自动聚合成三分子的环状聚合物,在一定催化剂的条件下,高纯度甲醛可以聚合成多聚甲醛。
舒客(Saky)专效护龈维他命牙膏推荐-保护牙龈健康,让笑容更自信
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