Gas Pressure Induced Porosity of CYTOP Polymer. A Positron Study
B. Zgardzińska, T. Goworek, M. Śniegocka, R. Zaleski
Institute of Physics, Maria Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland
and G. Dlubek
ITA Institut für Innovative Technologien, Kőthen/Halle, D-06120 Lieskau, Germany
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The pore formation in CYTOP polymer under high pressure of argon or nitrogen gases was investigated by positron annihilation spectroscopy. In the range 0-70 MPa, formation of large open pores was observed. After reduction of pressure to normal one, the free volumes inside the polymer structure remained enlarged. The structure of CYTOP can be restored by applying the temperature over 470 K at normal pressure.

DOI: 10.12693/APhysPolA.125.782
PACS numbers: 78.70.Bj, 74.62.Fj