Ok, I am really close to this. d-Limonene dissolves Polystyrene (I have tested this) and Liquid Isobutane mixes with d-Limonene (I have also tested this) However, when I mix all three together, the Polystyrene becomes completely separated from the solution. Same thing with all polymer solutions I try to mix with Isobutane, the polymer ceases to be dissolved. Is this simply a matter of proportions, or is there something more I need to notice? Preferably I just need some kind of polymer that is soluble in liquid isobutane, but I don't think that exists. Is there some kind of mixture that will stay homogenous that consists of isobutane, a solvent, and a polymer?