Naslov
Oxygen plasma functionalization of poly(p-phenilene sulphide)

Autori
Cvelbar , Uroš ; Mozetič , Miran ; Junkar , Ita ; Vesel , Alenka ; Kovač , Janez ; Drenik , Aleksander ; Vrlinič , Tjaša ; Hauptman, Nina ; Klanjšek-Gunde, Marta ; Markoli , Boštjan ; Krstulović , Nikša ; Milošević , Slobodan ; Gaboriau , Freddy ; Belmonte , Thierry

Izvornik
Applied Surface Science (0169-4332) 253 (2007), 21; 8669-8673

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
oxygen plasma; polymer; functionalization; PPS

Sažetak
Surface effects during plasma activation of poly(p-phenilene sulphide) – PPS has been studied. Samples were exposed to weakly ionized highly dissociated oxygen plasma created an inductively coupled radiofrequency discharge with the power of 100 W. The electron density and temperature were measured with a double Langmuir probe and were 4×1015 m-3 and 3 eV, respectively, while the neutral atom density was measured with a fiber optics catalytic probe and was 4×1021 m-3. The surface tension was determined by measuring the contact angle of deionized water, while the appearance of surface functional groups was detected by XPS. The surface tension of untreated PPS was 7×10-3 N/m or, and increased to 7×10-2 N/m in few seconds of plasma treatment. It remained fairly constant for longer plasma treatments. The XPS survey spectrum showed little oxygen on untreated samples, but its concentration increased to about 20 at.% in few seconds. Detailed high resolution XPS C1s peak showed that the carbon was left fairly stable during plasma treatment. The main functional groups formed were rather sulphate in sulphite groups, as determined from high resolution S2p peak. Namely, a strong transition from sulphide to sulphate state of sulfur was observed. The spontaneous deactivation of the polymer surface was measured as well. The deactivation was fairly logarithmic with the characteristic decay time of several hours.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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