PLASTIC FANTASTIC
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![]() A polymer (left) that breaks down after being exposed to sunlight for 10 minutes (Photo: American Chemical Society/Paul Kohl) |
A group of researchers from the Georgia Institute of Technology have developed something that seems fit for a “Mission Impossible” movie – polymers that disappear on command.
Developed for the US Department of Defense, the material is tough enough to transport packages into hostile territory and then vaporise upon completion of a military mission. Fashioned into a rigid-winged glider and with a nylon-like parachute fabric for airborne delivery, it can cross distances of over 100 km.
The researchers incorporated a photosensitive additive that absorbs light to catalyse depolymerisation. The key to making the polymer disappear is a “ceiling temperature”, where above this temperature, it will break down into its component monomers. Standard plastics, like polystyrene, have a ceiling temperature above ambient temperature and are thus very stable. But with low ceiling-temperature polymers, depolymerisation can happen at the flick of a light switch.
A non-military application for this technology? Perhaps it could be used to write to-do lists on. And off they go all these tasks, gone with the sun.
Developed for the US Department of Defense, the material is tough enough to transport packages into hostile territory and then vaporise upon completion of a military mission. Fashioned into a rigid-winged glider and with a nylon-like parachute fabric for airborne delivery, it can cross distances of over 100 km.
The researchers incorporated a photosensitive additive that absorbs light to catalyse depolymerisation. The key to making the polymer disappear is a “ceiling temperature”, where above this temperature, it will break down into its component monomers. Standard plastics, like polystyrene, have a ceiling temperature above ambient temperature and are thus very stable. But with low ceiling-temperature polymers, depolymerisation can happen at the flick of a light switch.
A non-military application for this technology? Perhaps it could be used to write to-do lists on. And off they go all these tasks, gone with the sun.
20.09.2019 Plasteurope.com [243363-0]
Published on 20.09.2019