Moldable plastic from styrofoam

Technology
Moldable plastic from styrofoam

Common packaging styrofoam is actually puffed polystyrene, the same polymer that’s used to make things like CD cases and plastic model parts. When acetone is used as a solvent, the expanded polystyrene will easily dissolve and you’ll be left with a liquid acetone/polystyrene solution. As the acetone evaporates, the polystyrene becomes increasingly viscous: first pourable, then moldable, and finally solid polystyrene plastic.

Solid polystyrene will dissolve in acetone as well, but with the vastly larger surface area (due to all the little gas bubbles) styrofoam dissolves much faster. That, and it’s readily available if you have a basement full of old packaging materials.

There must be an easy method for pouring or spin-casting custom plastic parts or action figures using dissolved polystyrene. Have any of you ever tried this or have any ideas on the subject? Please let us know in the comments!

Instructable: How to “make” plastic – Link
Wikipedia: Polystyrene – Link

What will the next generation of Make: look like? We’re inviting you to shape the future by investing in Make:. By becoming an investor, you help decide what’s next. The future of Make: is in your hands. Learn More.

Tagged
Discuss this article with the rest of the community on our Discord server!

ADVERTISEMENT

Escape to an island of imagination + innovation as Maker Faire Bay Area returns for its 16th iteration!

Prices Increase in....

Days
Hours
Minutes
Seconds
FEEDBACK