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Showing 1 to 7 of 7 for “"fluorinated polymers"”.
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Synthesis of fluorinated polymers in supercritical carbon dioxide (scCO₂)
… dioxide (scCO₂) at 120 °C and 1500 bar. Using perfluorinated hexyl iodide as CTA, polymers of low polydispersity ranging from 1.5 to 1.2 at the highest iodide concentration of 0.25 mol·L-1 were obtained. Electrospray ionization- mass spectroscopy (ESI-MS) indicates the absence of initiator derived …
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Elucidating the Role of Fluorine on Gas Transport Through Fluorinated Polymer Membranes
Fully fluorinated polymers (i.e., perfluoropolymers) are a unique class of materials that have shown exceptional separation performance due to their anomalous thermodynamic partitioning compared to typical hydrocarbon polymers. The goal of this work is to elucidate the role of fluorine on gas …
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The Synthesis and properties of functionalised polymers
The aim of this project was to synthesise fluorinated polymers that might act as hot material in a guest-host system for use in non-linear optical applications. These polymers would be expected to have the advantage over materials such as poly(vinylidene fluoride) which is known to be incompatible …
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Studies Toward Highly Fluorinated Polyphenylenes by Diels-Alder Polymerization
… (DAPPs) are chemically and thermally stable polymers, used for dielectric resins, gas separation membranes, and fuel cell proton exchange membranes. Highly fluorinated DAPPs are expected to have better thermal stability and chemical resistance, higher glass transition temperatures, improved …
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Advanced Polymeric Membranes and Multi-Layered Films for Gas Separation and Capacitors
… ether ketone)s was compared. Two of the polymers had symmetric bisphenols while the remaining two had asymmetric bisphenols. Two contained trifluoromethyl groups while the other two had methyl groups. The symmetric polymers had Tg's of approximately 160 °C while the asymmetric polymers …
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Surface chemistry of N-Heterocyclic carbenes and the self-assembly, structure, and properties of polymer metal-organic cage gels
… Additionally, we demonstrate grafting of highly fluorinated polymers from surface-bound ANHCs. Chapter 3. Reactions of Persistent Carbenes with Hydrogen-Terminated Silicon Surfaces We report here the use of persistent aminocarbenes to functionalize via Si-H insertion reactions a range of …
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Modification of a commercial poly (VDF-co-HFP) copolymer latex
Fluorinated polymers are niche macromolecules that play an essential role in modern life. The special properties of fluorine, including among others, a large electronegativity (ca 3.98), low polarisability, small van der Waal’s radius (135 pm) and the strong C-F bond (ca 485 kJ · mol−1), impart …