Some types of polymer will deteriorate very quickly a normal environment. In most cases, it will come from rucksack naphon UV light. UV rays will make the engine with the polymer and len bond hotels.
Polymer types are deteriorating so fast that the normal environment. Most will just be a result of ultraviolet light. UV rays react with the polymer. And breaking covalent bonds.
Some types of polymers will deteriorate fast at regular environment. The most is the result of being UV light. UV rays can react with polymer, and destroy the covalent bond .