端羟基聚二甲基硅氧烷缩聚固化涂膜的“等当点”特性

The Character of “Equivalent Point”of the Coatings by Curing Reaction of Hydroxyl Terminated Polydimethylsiloxane

实验发现,线型端羟基聚二甲基硅氧烷与固化剂发生聚缩反应而固化成膜时,在“等当点”膜表面有最强的疏水性。且对同一种端羟基聚二甲基硅氧烷,“等当点”随固化剂官能度而改变。

This paper is concerned with the relationship between 'equivalent point' of cur-ing reaction of hydrixy terminated polydimethylsiloxane and hydrophobicity of itscoating.It is found that the hydrophobicity of the coating is the best at 'equivalent point'and that 'equivalent point'changes with various curing systems.