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(a) Fluorescence intensity at 460 nm of a 0.01 wt % of TPE/SBS film before (draw ratio = 1) and after (draw ratio = 3) uniaxial deformation at room temperature (λexc = 360 nm) for different drawing cycles, and (b) pictures of the same film before (left), during (middle) and after deformation (relaxation, right) under the illumination with a long range UV lamp at 366 nm. Draw ratio = 1 means the pristine undeformed film.
