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davidzxl

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[求助] 聚氨酯的制备

小弟第一次做聚氨酯,想请问各位大侠们,在最后一步很稠很粘时,加入水之后突然变成乳液,这个水为什么能使它变成乳液呢?我用的是预聚体是聚酯多元醇和MDI。R=0.95.
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