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American Chemical Society's Weekly PressPac -- April 22, 2009

As a result, thermoset plastics often end up in landfills or incinerators, where they can contribute to pollution. Scientists have long-sought a simple, inexpensive process to make these plastics recyclable, but they have been largely unsuccessful until now.

Broekhuis and colleagues describe development of a new type of thermosetting plastic that can be melted and remolded without losing its original heat-resistance and strength. The scientists showed in laboratory tests that they could melt granules of what they term a "self-healing" polymer and reform them into uniform, rigid plastic bars. They also showed that the plastic could be remolded multiple times, setting the stage for a new generation of recyclable plastics. - MTS

"Thermally Self-Healing Polymeric Materials: The Next Step to Recycling Thermoset Polymers?"


Antonius A. Broekhuis, Ph.D.
Department of Chemical engineering/Product Technology
University of Groningen
Groningen, The Netherlands


Presto! Fast color-changing material may lead to improved sunglasses
Journal of the American Chemical Society

Researchers in Japan are reporting development of a new so-called "photochromic" material that changes color thousands of times faster than conventional materials when exposed to light. The development could lead to a wide range of new products including improved sunglasses, more powerful computers, dynamic holograms, and better medicines, the researchers say. Their report appears in the Journal of the American Chemical Society, a weekly publication.

In the new study, Jiro Abe and colleagues note

Contact: Michael Woods
American Chemical Society

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