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Adhesive loses its stick with heat

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12:47pm, October 9, 2001

Like the sticky stuff on Post-It notes, a new epoxy adhesive can bind and unbind

materials repeatedly.

The adhesive is the first epoxy that's sticky enough to hold materials together at

low temperatures but that reversibly loses its grip when hot, says Jim Aubert,

whose team developed the epoxy at Sandia National Laboratories in Albuquerque.

Some polymers also show this trait in reverse (SN: 8/21/99, p. 118: http://www.sciencenews.org/sn_arc99/8_21_99/fob6.htm).

Engineers could benefit from a reversible adhesive when building complicated

machinery or weapons that might later need updating with new parts or electronics,

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