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Moghaddam S, Rafiee E, Joshaghani M, Eavani S, Barati A, Kamrani S, Sadrjavadi K. Fabrication of flexible self-cleaning photocatalytic film using polysiloxane with a good mechanical property and stability. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Touzi H, Chevalier Y, Kalfat R, Jaffrezic-Renault N. New elastomeric polymethylsiloxane membranes bearing cationic exchanging sites for anionic dyestuffs sensors. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.04.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tkachenko I, Shekera O, Bliznyuk V, Shevchenko V. Fluorinated allyl-, acetyl-, and bromo-containing hydroxyl-substituted phenyl ethers with a hexafluorobenzene or decafluorobiphenyl central unit. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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McKellar BR, Venkat N, Safriet S, Brown JM, Unroe MR, Bechel V, Fossum E. Bismaleimide/preceramic polymer blends for hybrid material transition regions. HIGH PERFORM POLYM 2012. [DOI: 10.1177/0954008312466879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The problem of phase separation in polycarbosilane (Starfire resin)–Matrimid thermoset blend structures, designed for thermal protection applications, was addressed in this study. The structural design of the compatibilizers synthesized via a hydrosilylation–deprotection sequence was primarily based on a polymer structure with a nonpolar segment consisting of a carbosilane unit and a polar segment with a bisphenol-type moiety. Besides the homopolymer, block copolymers with varying contents of the polycarbosilane unit and the bisphenol A unit were synthesized and characterized. Curing experiments on the blends of Starfire resin–Matrimid incorporating 1–5% of the compatibilizers were performed followed by morphological characterization of the cured resin plaques. The effectiveness of the compatibilizers was assessed by the StarFire domain size and the distribution of cured specimens was examined in the scanning electron micrographs. Results indicated that the compatibilizers that were more effective in minimizing phase separation were relatively more polar and comprised a larger fraction of the phenolic functional units. In fact, the blend composition incorporating 5% of the homopolymer compatibilizer with the largest fraction of the polar bisphenol A unit was highly effective in providing a homogeneous distribution of very small StarFire domains, that is, fairly uniform domain sizes of the order of 5 µm or less.
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Affiliation(s)
- Bernard R. McKellar
- Multi-Scale Composites and Polymers Division, University of Dayton Research Institute, Dayton, OH, USA
| | - Narayanan Venkat
- Multi-Scale Composites and Polymers Division, University of Dayton Research Institute, Dayton, OH, USA
- Materials Directorate, Air Force Research Laboratories, WPAFB, OH, USA
| | - Sirina Safriet
- Multi-Scale Composites and Polymers Division, University of Dayton Research Institute, Dayton, OH, USA
- Materials Directorate, Air Force Research Laboratories, WPAFB, OH, USA
| | - Janis M. Brown
- Materials Directorate, Air Force Research Laboratories, WPAFB, OH, USA
| | - Marilyn R. Unroe
- Materials Directorate, Air Force Research Laboratories, WPAFB, OH, USA
| | - Vernon Bechel
- Materials Directorate, Air Force Research Laboratories, WPAFB, OH, USA
| | - Eric Fossum
- Department of Chemistry, Wright State University, Dayton, OH, USA
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Solid-state NMR on thermal and fire residues of bisphenol A polycarbonate/silicone acrylate rubber/bisphenol A Bis(diphenyl-phosphate) (PC/SiR/BDP) and PC/SiR/BDP/zinc borate (PC/SiR/BDP/ZnB) — Part II: The influence of SiR. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.07.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Putzien S, Nuyken O, Kühn FE. Functionalized polysilalkylene siloxanes (polycarbosiloxanes) by hydrosilylation—Catalysis and synthesis. Prog Polym Sci 2010. [DOI: 10.1016/j.progpolymsci.2010.01.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Crucianelli M, Saladino R, De Angelis F. Methyltrioxorhenium catalysis in nonconventional solvents: a great catalyst in a safe reaction medium. CHEMSUSCHEM 2010; 3:524-540. [PMID: 20391453 DOI: 10.1002/cssc.201000022] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The requirement that chemical processes are sustainable, reflected in waste reduction and the use of safe reagents and reaction conditions, is becoming even more stringent as a result of pressure by society and governments to preserve the environment and protect human health. Catalysis offers numerous benefits related to green chemistry, including lowered energetic reaction requirements; catalytic, rather than stoichiometric, amounts of materials; increased selectivity; lowered consumption of processing and separation agents; and, in many cases, the use of less-toxic compounds. Our research group has for a long time been studying methyltrioxorhenium in the oxyfunctionalization of different substrates, by using H(2)O(2) or its urea-hydrogen peroxide complex as the primary oxidant. In this Review paper we aim to provide a full literature account on the catalytic activity and selectivity of methyltrioxorhenium in the oxyfunctionalization reaction, either in nonconventional solvents or under solvent-free conditions, with a particular emphasis on the use of ionic liquids as green reaction media.
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Affiliation(s)
- Marcello Crucianelli
- Dipartimento di Chimica, Ingegneria Chimica e Materiali, Università dell'Aquila, Via Vetoio, 67100 L'Aquila, Italy.
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Herbert M, Montilla F, Galindo A. Supercritical carbon dioxide, a new medium for aerobic alcohol oxidations catalysed by copper-TEMPO. Dalton Trans 2010; 39:900-7. [DOI: 10.1039/b914788h] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Herbert M, Galindo A, Montilla F. Methyltrioxorhenium Complexes of Polydimethylsiloxane-Functionalized Pyridine as Efficient Olefin Epoxidation Catalysts in Solventless and Low-Polar Solvent Conditions. Organometallics 2009. [DOI: 10.1021/om900111n] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew Herbert
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Apartado 1203, 41071 Sevilla, Spain
| | - Agustín Galindo
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Apartado 1203, 41071 Sevilla, Spain
| | - Francisco Montilla
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Apartado 1203, 41071 Sevilla, Spain
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Affiliation(s)
- Jay W. Grate
- Pacific Northwest National Laboratory, P.O. Box 999, Richland Washington 99352
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Roy AK. A Review of Recent Progress in Catalyzed Homogeneous Hydrosilation (Hydrosilylation). ADVANCES IN ORGANOMETALLIC CHEMISTRY 2007. [DOI: 10.1016/s0065-3055(07)55001-x] [Citation(s) in RCA: 166] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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AntiĆ VV, AntiĆ MP, Govedarica MN, DvorniĆ PR. Kinetics and mechanism of the formation of poly[(1,1,3,3-tetramethyldisiloxanyl)ethylene] and poly(methyldecylsiloxane) by hydrosilylation. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.21992] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Racles C, Hamaide T. Synthesis and Characterization of Water Soluble Saccharide Functionalized Polysiloxanes and Their Use as Polymer Surfactants for the Stabilization of Polycaprolactone Nanoparticles. MACROMOL CHEM PHYS 2005. [DOI: 10.1002/macp.200500139] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Rousseau IA, Qin H, Mather PT. Tailored Phase Transitions via Mixed-Mesogen Liquid Crystalline Polymers with Silicon-Based Spacers. Macromolecules 2005. [DOI: 10.1021/ma048327y] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ingrid A. Rousseau
- Institute of Materials Science and Chemical Engineering Department, University of Connecticut, Storrs, Connecticut 06269
| | - Haihu Qin
- Institute of Materials Science and Chemical Engineering Department, University of Connecticut, Storrs, Connecticut 06269
| | - Patrick T. Mather
- Institute of Materials Science and Chemical Engineering Department, University of Connecticut, Storrs, Connecticut 06269
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Polysilalkylene or Silarylene Siloxanes Said Hybrid Silicones. INORGANIC POLYMERIC NANOCOMPOSITES AND MEMBRANES 2005. [DOI: 10.1007/b104479] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Senthilkumar U, Reddy B. Structure–gas separation property relationships of non-ionic and cationic amino-hydroxy functionalized poly (dimethylsiloxane) membranes. J Memb Sci 2004. [DOI: 10.1016/j.memsci.2003.11.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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