Researchers from the University of Bath discovered that adding sugar units to polymers increases their degradability when exposed to UV radiation Many plastics that bear the biodegradable label can only be composted in industrial settings, but researchers at the University of Bath have now discov
They discovered that incorporating even 3% of sugar polymer units into PLA caused PLA to degrade by 40% after six hours of UV exposure.
Although it is sometimes advertised as biodegradable, it only dissolves under industrial composting conditions of high temperatures and humidity, which are not possible in residential compost heaps. It has also limited biodegradability in natural environments, such as soil or the ocean. Most promisingly, the technology is compatible with existing plastic manufacturing processes, meaning it could potentially be tested and adopted quickly by the plastics industry.. The researchers hope their findings will be used in the future by the plastics industry to help make plastic waste more degradable at the end of the life of the product.
“Most PLA plastics are made up of long polymer chains which can be difficult for water and enzymes to break down. Our research adds sugars into the polymer chains, linking everything together by bonds that can be broken using UV light.
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