Synthesis of sulfur-rich polymers: Copolymerization of cyclohexene sulfide and carbon disulfide using chromium complexes
| Autor: | Alberto de Angelis, Chiara Francesca Carrozza, Incoronata Tritto, Selena Silvano, Simona Losio, Laura Boggioni |
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| Přispěvatelé: | Silvano, S, Carrozza, C, de Angelis, A, Tritto, I, Boggioni, L, Losio, S |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Polymers and Plastics
Sulfide Polymers Cyclohexene chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Chromium Copolymerization Polymer chemistry Materials Chemistry Copolymer Selectivity COS chemistry.chemical_classification Carbon disulfide Catalysts Copolymers Organic Chemistry CYCLIC TRITHIOCARBONATES OXIDE COCATALYST 021001 nanoscience & nanotechnology Sulfur 0104 chemical sciences POLYMERIZATION chemistry Polymerization REFRACTIVE-INDEX EPOXIDES 0210 nano-technology CS2 DIOXIDE POLYCARBONATES |
| Zdroj: | Macromolecules 53 (2020): 8837–8846. doi:10.1021/acs.macromol.0c01555 info:cnr-pdr/source/autori:Silvano S.; Carrozza C.F.; de Angelis A.R.; Tritto I.; Boggioni L.; Losio S./titolo:Synthesis of sulfur-rich polymers: Copolymerization of cyclohexene sulfide and carbon disulfide using chromium complexes/doi:10.1021%2Facs.macromol.0c01555/rivista:Macromolecules (Print)/anno:2020/pagina_da:8837/pagina_a:8846/intervallo_pagine:8837–8846/volume:53 |
| DOI: | 10.1021/acs.macromol.0c01555 |
| Popis: | An investigation of the copolymerization of cyclohexene sulfide and carbon disulfide using salphen and salen Cr complexes as catalysts and [PPN]+X- salts as cocatalysts, at different temperatures and reaction times, is reported. Both catalytic systems produce both polymer and cyclic products. For the first time, poly(trithiocyclohexylcarbonates) (PCS) have been synthetized in high yields and high molecular weights. Salphen-based catalysts, in comparison with salen-based ones, show higher productivity and selectivity for polymers with high molecular weight up to 18 kg/mol when the reaction is carried out at 25 °C. At a higher temperature with (salphen)CrCl, the maximum value of selectivity for copolymers (72%) was obtained at a short reaction time (3 h). At long reaction times, great amounts of cyclic by-product are observed, thus evidencing the tendency for cyclohexene sulfide and CS2 to provide cyclic products due to the stability of the trithiocyclohexylcarbonate. PCS possesses high refractive index (n > 1.72), and antimicrobial assays reveal that these materials are active against Escherichia coli and moderately active against Staphylococcus aureus. These properties along with the Tg values of 80 °C make these polymers suitable for interesting applications different from those of poly(trithiopropylencarbonate). |
| Databáze: | OpenAIRE |
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