Jeffrey Pyun

Nov 20, 2023 | nature.com | Derek J Bischoff |Kyung-Seok Kang |Jeffrey Pyun

AbstractMultiple relaxation times are used to capture the numerous stress relaxation modes found in bulk polymer melts. Herein, inverse vulcanization is used to synthesize high sulfur content (≥50 wt%) polymers that only need a single relaxation time to describe their stress relaxation. The S-S bonds in these organopolysulfides undergo dissociative bond exchange when exposed to elevated temperatures, making the bond exchange dominate the stress relaxation.