Externet Posted August 16, 2009 Share Posted August 16, 2009 Hello. Do you know of any inorganic compound in powder form that becomes gas when triggered by an 'stimulus' like light, microwaves, heat... Like every particle of the powder release or turn to gas ? I want to make bubbles, megazillions of them... How is styrofoam made? Is it by mixing two chemicals or by external stimulus ? Link to comment Share on other sites More sharing options...
John Cuthber Posted August 17, 2009 Share Posted August 17, 2009 Bicarbonate of soda gives CO2 and H2O on heating. Link to comment Share on other sites More sharing options...
hermanntrude Posted August 18, 2009 Share Posted August 18, 2009 decomposition of H2O2? Link to comment Share on other sites More sharing options...
John Cuthber Posted August 19, 2009 Share Posted August 19, 2009 H2O2 isn't ordinarily a solid, did you mean percarbonate or some such? Link to comment Share on other sites More sharing options...
hermanntrude Posted August 20, 2009 Share Posted August 20, 2009 oh crap... missed that bit. Link to comment Share on other sites More sharing options...
CaptainPanic Posted August 27, 2009 Share Posted August 27, 2009 styrofoam is made by mixing polystyrene and a solvent in an extruder (the mixture is at high pressure/temperature inside the extruder). When it leaves the extruder, the pressure becomes atmospheric, and the solvent which is inside the polystyrene expands a lot, and the polystyrene becomes the foam (with the solvent gas in the air-pockets). then you have to leave it for a while so that air can replace the solvent in the air-pockets in the foam. But styrofoam is organic... not inorganic. Link to comment Share on other sites More sharing options...
Externet Posted September 8, 2009 Author Share Posted September 8, 2009 Found something, but still do not know what compounds are they Niopen http://www.alibaba.com/product/ua103664211-103455883-0/Foam_agents_for_foamed_concrete_making_NIOPEN_and_BIOPEN.html and OBSH http://www.alibaba.com/product-gs/237089510/OBSH_foaming_agent.html Miguel Link to comment Share on other sites More sharing options...
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