A detailed investigation into the gas permeation properties of addition-type poly(5-triethoxysilyl-2-norbornene)
| Autor: | V. P. Shantarovich, Christopher R. Maroon, Roman Nikiforov, Yuri Yampolskii, Ludmila Starannikova, Brian K. Long, Kevin R. Gmernicki, Nikolay A. Belov |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic Chemistry General Physics and Astronomy Butane 02 engineering and technology Polymer Permeation 010402 general chemistry 021001 nanoscience & nanotechnology Propyne 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Polymerization Polymer chemistry Materials Chemistry Barrer Solubility 0210 nano-technology Glass transition |
| Zdroj: | European Polymer Journal. 93:602-611 |
| ISSN: | 0014-3057 |
| Popis: | Poly(5-triethoxysilyl-2-norbornene) was prepared in good yield (71%) by vinyl-addition polymerization using the catalyst trans-Ni(C 6 F 5 ) 2 (SbPh 3 ) 2 . This polymer is completely amorphous and has a high glass transition temperature (325 °C). Investigation of its gas permeation parameters revealed that it has relatively high gas permeability for a variety of gases (e.g. P (O 2 ) = 211 Barrer). A unique feature of poly(5-triethoxysilyl-2-norbornene) is that it is a glassy material that exhibits solubility controlled permeation of hydrocarbons, a feature that is commonly only found in rubbery polymers and polymers with extremely large free volume (e.g. poly[(trimethylsilyl)propyne]. The permeability coefficient of butane in this polymer ( P (C 4 H 10 )) is as high as 5 × 10 3 Barrer, whereas its butane/methane selectivity ( P (C 4 H 10 )/ P (CH 4 )) is 21 ± 3. Analysis of poly(5-triethoxysilyl-2-norbornene)'s permeability coefficients, diffusion coefficients, solubility coefficients, and free volume demonstrate that this polymer combines the attractive properties of both a rubbery polymer and a glassy polymer. |
| Databáze: | OpenAIRE |
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