Polymer remembers four shapes
A polymer takes on four shapes depending on the temperature. Researchers have uncovered shape-memory properties in a commercially available polymer that's widely used to make fuel-cell membranes. The polymer, Nafion, can take on four different shapes in response to temperature changes--researchers have made triple-shape polymers before. "It's the most versatile smart polymer ever discovered," says Tao Xie, a polymer scientist at the GM Research and Development Center in Warren, MI, who published his findings in this week's Nature.
Polymer remembers four shapes
(PhysOrg.com) -- A new study by General Motors has found that a polymer used commercially in fuel cell membranes can "memorize" four shapes, each assigned to a different temperature. The material ...
Mon 15 Mar 10 from PhysOrg
Teaching an Old Polymer Memory Tricks
A polymer takes on four shapes depending on the temperature. Researchers have uncovered shape-memory properties in a commercially available polymer that's widely used to make fuel-cell ...
Thu 11 Mar 10 from MIT Technology Review
Shape-shifting polymers
Polymer can reversibly take on a range of different shapes in response to changes in temperature
Thu 11 Mar 10 from Chemistry World
Polymer shifts shape with changing temperature
Common material's 'memory' could be exploited for applications
Wed 10 Mar 10 from ScienceNews
Heat-Sensitive Material Remembers Four Shapes
A new polymer can "remember" up to four different shapes, and revert to each one at different temperatures.
Wed 10 Mar 10 from Livescience
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