High Refractive Index Copolymers with Improved Thermomechanical Properties via the Inverse Vulcanization of Sulfur and 1,3,5-Triisopropenylbenzene
| Autor: | Kookheon Char, Jim Schwiegerling, Clay B. Arrington, Soha Namnabat, Jeffrey Pyun, Ngoc A. Nguyen, Michael E. Mackay, Philip T. Dirlam, Richard S. Glass, Laura E. Anderson, Tristan S. Kleine, Robert A. Norwood, Sasaan A. Showghi, Michael S. Manchester, Edward Anthony LaVilla |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics chemistry.chemical_element Thermosetting polymer 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Inorganic Chemistry chemistry.chemical_compound law Polymer chemistry Materials Chemistry Copolymer High-refractive-index polymer Comonomer Organic Chemistry Vulcanization 021001 nanoscience & nanotechnology Sulfur 0104 chemical sciences chemistry Chemical engineering Covalent bond 0210 nano-technology Glass transition |
| Zdroj: | ACS Macro Letters. 5:1152-1156 |
| ISSN: | 2161-1653 |
| DOI: | 10.1021/acsmacrolett.6b00602 |
| Popis: | The synthesis of a novel high sulfur content material possessing improved thermomechanical properties is reported via the inverse vulcanization of elemental sulfur (S8) and 1,3,5-triisopropenylbenzene (TIB). A key feature of this system was the ability to afford highly cross-linked, thermosetting materials, where the use of TIB as a comonomer enabled facile control of the network structure and dramatically improved the glass transition temperature (relative to our earlier sulfur copolymers) of poly(sulfur-random-(1,3,5-triisopropenylbenzene)) (poly(S-r-TIB)) materials over a range from T = 68 to 130 °C. This approach allowed for the incorporation of a high content of sulfur–sulfur (S–S) units in the copolymer that enabled thermomechanical scission of these dynamic covalent bonds and thermal reprocessing of the material, which we confirmed via dynamic rheological characterization. Furthermore, the high sulfur content also imparted high refractive index (n > 1.75) and IR transparency to poly(S-r-TIB) copoly... |
| Databáze: | OpenAIRE |
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