Handout photo of stretchable material being tested for strength

 
Handout photo of stretchable material being tested for strength
A stretchy material made from polyurethane, in contrast to state-of-the-art materials for flexible electronics, the graded island (in white) does not delaminate from the transparent underlying material under extreme deformation, but instead, the composite fails only when the strength of the stretchable material is reached (R), as pictured in this handout photo. Studart/Handout