Polyvinyl alcohol (PVA; also referred to as: PVOH, PVAl) filament--the sacrificial support polymer filament used in 3D printing, how is that made? All the reactions I've seen that make PVA create a gel-like substance that could be used as a glue or perhaps a film. But it's not solid. (See image with beaker.)
The reactions I've seen use an alcohol (ethanol or methanol) and an alkaline catalyst (sodium hydroxide) which are combined with polyvinyl acetate. Here's the reaction that was used to make the beaker's gel PVA:
Another preparation can be seen in this video.
Is there some kind of coagulation/further reaction I must do to the gel to solidify its structure, or is the trick to do something during the first reaction, such as varying the temperature or pressure?
To clarify, I don't actually need/want it in the typical extruded filament form that would be needed for a 3D printer. A simple solid blob of the stuff would suffice. I'm very new to materials science and only a novice in chemistry, but I'd love any answers you wonderful folk could provide, even if they are dense scholarly articles. Thank you for your time!