Ceramics-Silikáty 56, (1) 40 - 49 (2012) |
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RELATION BETWEEN MECHANICAL PROPERTIES AND PYROLYSIS TEMPERATURE OF PHENOL FORMALDEHYDE RESIN FOR GAS SEPARATION MEMBRANES
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Šupová Monika 1, Svítilová Jaroslava 1, Chlup Zdeněk 2,
Černý Martin 1,
Weishauptová Zuzana 1,
Suchý Tomáš 3,1,
Machovič Vladimír 4,1,
Sucharda Zbyněk 1,
Žaloudková Margit 1
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1 Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic (ASCR),
V Holešovičkách 41, 182 09 Prague, Czech Republic
2 Institute of Physics of Materials, ASCR, v.v.i., Žižkova 22, 616 62 Brno, Czech Republic
3 Laboratory of Biomechanics, Czech Technical University, Faculty of Mechanical Engineering,
Department of Mechanics, Biomechanics and Mechatronics, Technická 4, 166 07 Prague, Czech Republic
4 Institute of Chemical Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
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Keywords: Glassy carbon, Membranes, Mechanical properties, Phenol-formaldehyde resin, Pyrolysis
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The aim of this paper has been to characterize the relation between the pyrolysis temperature of phenol-formaldehyde resin,
the development of a porous structure, and the mechanical properties for the application of semipermeable membranes for
gas separation. No previous study has dealt with this problem in its entirety. Phenol-formaldehyde resin showed an increasing
trend toward micropore porosity in the temperature range from 500 till 1000oC, together with closure of mesopores and
macropores. Samples cured and pyrolyzed at 1000oC pronounced hysteresis of desorption branch. The ultimate bending
strength was measured using a four-point arrangement that is more suitable for measuring of brittle materials. The chevron
notch technique was used for determination the fracture toughness. The results for mechanical properties indicated that
phenol-formaldehyde resin pyrolyzates behaved similarly to ceramic materials. The data obtained for the material can be
used for calculating the technical design of gas separation membranes. |
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