How long the polystyrene decay?
373306
It is supposed to be more than 2000 years.\nSee reference article.
833220
Soda is acidic.\nGum is rubber.\n\nI don't see why not, given enough time.\nI shall approximate the time for you...1 to 2 weeks.
828458
Maybe a week. I had this done a long time ago and it didn't take long at all.
517634
It lasts for\n1/24 from second
558979
Approximately 2-3 days after the initial exposure.
614121
Plastics last forever.  They are not biodegradable.
323369
Not long.  You can buy flesh colored bars to put in so it's not as visible.  I have a friend who does this.
286817
it can sty in your system for up to 30 days but it can also be detected in a strand of your hair for up to 6 months
1115802
It really depends on the conditions.  If there was high humidity, the cotton would deteriorate fast.  If there was a lack of humidity, but high temperatures, the polyester would break down faster.  Either way, it would be covered in mold, and quite likely tattered.
982763
Polymers from some plastics can supposedly leach.\nThis happens e.g. if you microwave something without removing the saran wrap.\n\nIn general the environmental hazard with plastics and polystyrene is not that they're toxic, but that they will last for thousands of years. It's unfortunately more economical to make them disposable than to recycle. If oil hit $200 a barrel or there were higher pollution fines /landfill fees this would change.
1149103
every thing is biodegradable if you give it enough time from 2 weeks for some things to 1,100,000 years for others
285749
Well i can't paste that on here for you...but consult this link; http://www.abb.com/GLOBAL/NOOFS/noofs187.nsf/viewunid/713C646EB0A24CCBC12569EE0036977F/$file/PS.pdf#search='MAKING%20POLYSTYRENE%2C%20process%20flow%20diagram'\n\nIf u can't access via the above link, go to http://www.search.abb.com Then type 'making polystyrene' or :PS Web 2001" Folow the first link...its a pdf file.
975520
as long as it lasts. lol
461210
Anywhere from 2 to 5 days.
776600
Styrene is regenerated from polystyrene by the action of heat (alone) in the absence of air.\nThe PS is simply placed in a retort and heated, whereupon it depolymerizes into styrene which  boils off...this is condensed into a receiver containing a small amount of inhibitor to prevent it from repolymerizing.
206492
If this is biodegrade styrofoam, any chemistry prof should be able to explain what you doing.  All hydrocarbons degrade under exposure to UV light (or stronger radiation), the real concern is to have them degrade without toxic byproducts, and into something that might be usable in the future as a raw materiel.
101789
as long as it takes for a person to dump the other! some last forever, some last for an hour!!!