Discussion Overview
The discussion revolves around the search for a hydrophilic polymer that can sublimate in a vacuum environment, specifically at approximately 10-7 torr. The context includes the application of this polymer in creating a thin film barrier for a liquid mirror project, involving interactions with silver coatings and ionic liquids.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant seeks a hydrophilic polymer that sublimes in a vacuum, emphasizing the need for specific properties for their application.
- Another participant inquires about additional required properties of the polymer beyond being hydrophilic and semi-volatile.
- A participant clarifies that the polymer is intended for a thin film (~20 nm) to act as a barrier between a silver coating and an ionic liquid, highlighting the importance of polymer sublimation for surface quality.
- A later post indicates a shift in focus from polymers to small-molecule organic materials, suggesting that these may be easier to sublime.
- One participant suggests using a parylene conformal coat followed by gold deposition and silver, proposing a specific layering approach.
- Another participant questions the suggestion of gold, indicating a preference for aluminum or chromium instead, which leads to a discussion about the reactivity of materials involved.
- A participant mentions concerns regarding the reactivity of silver with the ionic liquid, suggesting a cautious approach to material selection.
Areas of Agreement / Disagreement
Participants have not reached a consensus on the specific materials to use, as there are competing suggestions regarding the choice of metals and the type of materials (polymers vs. small molecules) that would be suitable for the application.
Contextual Notes
The discussion reflects uncertainties regarding the properties of the materials needed, the implications of material reactivity, and the specific requirements for the application in a vacuum environment.