Polymer

[Aidie]

I am trying to find a hydrophilic polymer that sublimes in vacuum (~ 10-7 torr).
Can anyone help me or tell me where i could find one?

[chemisttree]

What properties do you require of the polymer other than hydrophilic and semi-semi-volatile?

[Aidie]

Nothing else really, we don't need conductivity.
To tell a little more, I need a polymer to make a thin film (~20 nm) as a barrier between a silver coating and an ionic liquid. (this is for a liquid mirror project)
Polymer film is made by vacuum deposition, high temperature are obtained by ohmic heating.

-Silver coating has shown to make better bond with hydrophilic material (hence why hydrophilic polymer).
-Polymer sublimation helps to make a better surface on the liquid, less irregularities.

Those are the 2 most important properties.

[chemisttree]

edit. Let me think about this some....

[Aidie]

I mixed things up, i am more looking for a small-molecule organic materials with said properties, this should be way easier to sublime.

[chemisttree]

You might try a parylene conformal coat followed by gold deposition and finally silver.

[Aidie]

Thanks, but why gold? We were actually going to try an aluminium or chromium deposition instead.

[chemisttree]

I was going for non-reactive. You had some concerns regarding the reactivity of silver with the (unspecified) ionic liquid. It's a belt and suspenders thing....