6. Dynamic rheological frequency analysis of poly(sulfur-r-1,3diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5triisopropenylbenzene) (poly(S-r-TIB)) copolymers 7. Dynamic mechanical Analysis of of poly(sulfur-r-1,3diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5triisopropenylbenzene) (poly(S-r-TIB)) copolymers 8. Time resolved rheological analysis of self-healing properties of poly(sulfur-r-1,3-diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5-triisopropenylbenzene) (poly(S-r-TIB)) 9. Mechanical analysis of poly(sulfur-r-1,3-diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5-triisopropenylbenzene) (poly(S-r-TIB)) copolymers 10. Plot of refractive Index as a function of wavelength for poly(sulfur-r-1,3,5-triisopropenylbenzene) (poly(S-r-TIB)) copolymers 11. FTIR and UV-Vis transmission plots of poly(sulfur-r-1,3,5triisopropenylbenzene) (poly(S-r-TIB)) copolymers 12. Differential scanning calorimetry (DSC) analysis of poly(sulfur-r-1,3diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5triisopropenylbenzene) (poly(S-r-TIB)) copolymers 13. Thermogravimetric analysis (TGA) of poly(sulfur-r-1,3,5triisopropenylbenzene) (poly(S-r-TIB)) and poly(sulfur-r-1,3diisopropenylbenzene) (poly(S-r-DIB))copolymers II) Results and Discussion Section A. Dynamic rheological frequency analysis of poly(sulfur-r-1,3diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5triisopropenylbenzene) (poly(S-r-TIB)) copolymers to determine degree of crosslinked network microstructures B. Time resolved rheological analysis of self-healing properties of poly(sulfur-r-1,3-diisopropenylbenzene) (poly(S-r-DIB)) and poly(sulfur-r-1,3,5-triisopropenylbenzene) (poly(S-r-TIB)) copolymers C. Powder X-Ray Diffraction (XRD) of poly(sulfur-r-TIB) copolymers

High sulfur content copolymers were prepared via inverse vulcanization of sulfur with 1,4-diphenylbutadiyne (DiPhDY) for use as the active cathode material in lithium-sulfur batteries. These sulfur-rich polymers exhibited excellent capacity retention (800 mA h g À1 at 300 cycles) and extended battery lifetimes of over 850 cycles at C/5 rate. Fig. 3 (a) Cycling performance at C/5 of Li-S battery fabricated with poly(S-co-DiPhDY) prepared with a 10 wt% DiPhDY, 90 wt% sulfur feed ratio. (b) Plot of potential versus charge/discharge capacity for the Li-S cell shown in (a) at 100 cycle intervals. (c) Charge/discharge rate performance of Li-S battery with poly(S-co-DiPhDY) (10 wt% DiPhDY) at various current densities (1 C ¼ 1672 mA h). All capacities are specific capacity based on sulfur loading.This journal is

Optical technologies in the midwave and long wave infrared spectrum (MWIR, LWIR) are important systems for high resolution thermal imaging in near, or complete darkness. While IR thermal imaging has been extensively utilized in the defense sector, application of this technology is being driven toward emerging consumer markets and transportation. In this viewpoint, we review the field of IR thermal imaging and discuss the emerging use of synthetic organic and hybrid polymers as novel IR transmissive materials for this application. In particular, we review the critical role of elemental sulfur as a novel feedstock to prepare high refractive index polymers via inverse vulcanization and discuss the fundamental chemical insights required to impart improved IR transparency into these polymeric materials.