发布时间:2025-01-19 20:29:00
晚上好,5040和5027一样都是低分子量聚羧酸钠盐因为稀释溶剂是纯水在低温冷冻时可能会结晶,如果变成膏状或者固体可放置在温暖室内重新解冻,反复冻融对5040分散性能没有直接影响,但要注意已经加入分散的颜料色浆避免冰冻防止结块。
玻璃棒的主要作用如下①引流②加快溶解③均勻受热④蘸取少量试剂请用序号填写下列操作中玻璃棒的作用
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