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Science Forum Index » Polymers Forum » acetone and styrofoam...
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| zxis... |
 Posted: Fri Jul 04, 2008 9:40 pm |
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Guest
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Once the Styrofoam has been melted by acetone can it then be expanded just
like spray foam if so how can that be done, also what other chemicals can
mix with the melted mess to make it thinner?
Lucky |
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| john.spevacek at (no spam) aspenresearch.com... |
| Posted: Mon Jul 07, 2008 3:01 am |
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On Jul 4, 9:40 pm, "zxis" <z... at (no spam) comcast.net> wrote:
Quote: Once the Styrofoam has been melted by acetone can it then be expanded just
like spray foam if so how can that be done, also what other chemicals can
mix with the melted mess to make it thinner?
Lucky
Acetone is not the best solvent to work with for polystyrene as it
will evaporate very quickly. Something like toluene will be much
slower to evaporate and give you more working time. More solvent will
make the whole "melted mess" thinner.
As for refoaming it, this can be challenging without the proper
(expensive) equipment. There are thermally inititated foaming agents
that you could try and mix into the solvated polystyrene, heating the
polymer once the solvent is all evaporated. These are generally based
on nitrogen generation from a (di) azo compound.
John
Aspen Research, - www.aspenresearch.com
“Turning Questions into Answers”
Opinions expressed herein are my own and may not represent those of my
employer. |
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| Englishmystic... |
| Posted: Mon Jul 21, 2008 3:41 pm |
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Also you can expand polystyrene with isopentane, which is how foamboard is
made. You need some pressure while it is mixing, and then it exands by
itself as soon as it is exposed to air at ambient temperatures. |
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