Burning Bioplastic

Having fireproof plastic would be pretty cool, right? Or at least having plastic that when it burns, doesn't release toxic fumes?

I put dried Ag10 directly into a burning candle flame for two minutes. Then, after two minutes, I took the sample out of the direct flame and it could not sustain its own flame. It didn't even smolder or melt. It did shrink, though. The outer layers formed a layer of char that stopped further flames from reaching the inside of the bioplastic. This char can easily be peeled off, and then you have a semi-fresh fragment of bioplastic left.

To conclude, bioplastic seems fireproof to a certain extent to small and low-temperature flames for a little while. I suspect that with a hotter and larger flame, the bioplastic would probably just burn.