Controlled Disassembly of Elemental Sulfur: An Approach to the Precise Synthesis of Polydisulfides

Abstract

The usage of elemental sulfur (S 8 ) for constructing sulfur-containing polymers is of great significance in terms of sulfur resource utilization or fabrication of high-performance polymers. Currently, the random disassembly of S 8 hinders its direct use in the precise synthesis of sulfur-containing polymers. Herein, we provide an effective strategy for controlling the dismantlement of S 8 to synthesize polydisulfides, a promising category of dynamic bonds containing polymers. In this strategy, the completely alternating copolymerization of one sulfur atom, which is orderly derived from S 8 , with episulfides is achieved with 5,.0]dec-5-ene) as catalyst and[PPN]SbF 6 ([PPN] + is bis(triphenylphosphine)iminium) as cocatalyst. Delightedly, the living-polymerization feature, and the good monomer compatibility allows for the access to diverse polydisulfides. Furthermore, the density functional theory (DFT) was employed to elaborate the copolymerization process.

Anionic Hybrid Copolymerization of Sulfur with Acrylate: Strategy for Synthesis of High-Performance Sulfur-Based Polymers

“…The band for S− S−S vibrations could be clearly observed at 410−500 cm −1 in 1 h (Figure 2a). 32 However, such signals almost disappeared when the reaction time reached 24 h (Figure 2b). Furthermore, the band for the C−S vibration at 620−715 cm −1 considerably increased in intensity.…”

Carboxybetaine-Based Zwitterionic Polymer Nanogels with Long Blood Circulation for Cancer Therapy

“…As for the FTIR spectra of the PCBMA, peaks at 1633 and 1556 cm −1 were attributed to the stretching vibration of CONH groups (amide I and II bonds) derived from BAC, and peaks at 1731 and 1141 cm −1 were corresponding to the stretching vibration of C�O group and C−O−C group of the monomer, respectively (Figure 1e). Raman spectrum was examined and appeared band in the 520−470 cm −1 region belonging to disulfide stretching 29 (Figure 1f). In summary, the above results were evidence of the successful incorporation of crosslinkers into PCBMA nanogels.…”

Low birefringence and low dispersion aliphatic thermosets with a high and tunable refractive index

“…Based on previous reports on linear polymers from sulfur and thiiranes, 26,27 along with our recent studies towards the development of functional polysulfide latexes, 28,29 we envisioned that fully aliphatic polysulfide polymers and their analogues could be used as starting materials in the preparation of high sulfur content HRIPs under suitable polymerization conditions. Herein, we report a new class of HRIPs, p(PS-BEPS), prepared through the copolymerization of polysulfide polymers, bis(2,3-epithiopropyl)sulfide (BEPS), and elemental sulfur (Scheme 1).…”