Extended Data Fig. 5: Structural characterization of the molecular configuration and free volume in SIBS and SVS.
From: Hermetic stretchable seals enabled by a viscoplastic surface effect
a, Two-dimensional (2D) GIWAXS patterns of SIBS and SVS within the surface region. b, Corresponding 1D GIWAXS profiles extracted from the 2D GIWAXS data. The shoulders observed at the wider angle, at q4, arise from the aromatic π−π interactions between two adjacent phenyl groups that are attached to the backbone. Compared to the SIBS, the peak positions for q1 and q3 disappear in SVS, while the intensity of q2 is enhanced and that of q4 is reduced, indicating a weakening of π−π stacking interactions within the rearranged PS nanodomains. c, Positron annihilation lifetime spectra measured in SIBS and SVS. d, The deconvoluted intensities and lifetimes from the spectra in (c). The calculated fractional free volume (FFV) was identical for SIBS and SVS, suggesting no defects were created after the introduction of MAPP.
