New Delhi: Scientists have developed a new type of plastic that can be broken down into its original chemical building blocks and remade multiple times without losing its strength, offering a promising step toward reducing plastic waste.
Researchers at the University of Colorado Boulder redesigned a durable thermoset plastic, commonly used in aerospace and microelectronics, using a reversible chemical process. Unlike conventional plastics that degrade in quality after repeated recycling, the new material can be disassembled into monomers and rebuilt while retaining its original properties.
The study, published in Nature Chemistry focuses on a polycyanurate thermoset rather than the PET plastic used in everyday bottles. Researchers said the breakthrough demonstrates how future plastics could be designed with endless recyclability in mind.
Lead researcher Wei Zhang said the team explored a new way of breaking and reforming chemical bonds, allowing the material to be recycled repeatedly without compromising performance.
Scientists noted that conventional recycling often leads to “downcycling,” where plastics are converted into lower value products because repeated processing weakens the material. The new dynamic chemistry approach aims to create a closed loop recycling system in which plastics can be continuously reused.
Although the technology remains at the laboratory stage and is not yet ready for commercial recycling plants, researchers believe the method could eventually be adapted for a wider range of plastics, potentially improving recycling efficiency and reducing plastic pollution.
In a separate breakthrough, researchers at the Shenzhen Institute of Synthetic Biology in China have developed a “living plastic” embedded with dormant bacteria that can be activated to break down the material completely.
The study published in ACS Applied Polymer Materials used engineered Bacillus subtilis spores inside a biodegradable plastic called polycaprolactone (PCL). When exposed to a warm nutrient solution the spores became active and produced enzymes that degraded the plastic into its basic building blocks within six days, leaving behind no microplastic particles.
Researchers said the material behaves like ordinary plastic during use but carries a built in degradation mechanism that can be triggered after disposal. While the technology has only been demonstrated under laboratory conditions, it could pave the way for future plastics that are designed to safely decompose after use, helping tackle long term plastic pollution.