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Polyurethane shape shifts in water

Singapore-Researchers in Singapore and China have come up with what they describe as “a programmable polyurethane shape memory polymer.” The actuation process is water driven, with hydrogen bonding the key to the water-immersion behaviour. The material is shaped, but gradually changes back to a former permanent shape when immersed in water.

Developers at Nanyang Technological University in Singapore and the College of Transportation Engineering in Nanjing, China described the novel PU material in the 14 March 2005 issue of Applied Physics Letters.


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Applied Physics Letters (US) story

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