This is one of the strong arguments against using a lot of plastic: It doesn't. Fifty thousand years from now, when aliens from a distant galaxy land on the dry dusty earth and dig through the gray sand to find out whether there was ever life here, they'll find buried plastic. And BTW ... the word is "disintegrate".
You mean decompose -- Plastic decompose in a long period of time depending on the type of plastic and the environmental condition to which it is exposed.
All products made up of plastic take very long time to decompose, reaching thousands of years.
About a week
It does rot as per me. I have never seen a plastic gets rot
About 400 years
500 years
about 15,000,000 years
420 years ,
More then your moms face
400 years
420 years ,
It very depends on what type of plastic. Normally it taks hundreds to thousands years.and somtimes forever.