caa a22 4500 465787800 CHVBK 20180323112014.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00983969 doi (NATIONALLICENCE)springer-10.1007/BF00983969 Phase transition in swollen gels [Elektronische Daten] 14. The DC conductivity of swollen poly(N,N-diethylacrylamide) gels in the collapse region [Jan Nedbal, Martin Štula, Michal Ilavský] Summary: The DC conductivity of two networks — a poly(N,N-diethylacrylamide) network (N1) and a network prepared by the copolymerization of N,N-diethylacrylamide with 3 mol.% of sodium methacrylate (N2) — in deionized water in the temperature range 10-55°C was measured. While in the low-temperature range (expanded gel state) the volt-ampere (V-A) behaviour of both networks shows a semiconductive character (conductivity increases with increasing temperature), in the high-temperature range (collapsed gel state) the conductivity of the network N1 rapidly decreases with increasing temperature (metallic character). The presence of charges on the chain raises the conductivity and shifts the temperature of the change in conductivity to higher values. In the collapse region of the ionized network N2 anomalies were observed on the V-A characteristics. Springer-Verlag, 1990 Nedbal Jan Faculty of Mathematics and Physics, Charles University, CS-180 00, Prague 8, Czechoslovakia aut Štula Martin Faculty of Mathematics and Physics, Charles University, CS-180 00, Prague 8, Czechoslovakia aut Ilavský Michal Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, CS-162 06, Prague 6, Czechoslovakia aut Polymer Bulletin Springer-Verlag 23/1(1990-01-01), 89-94 0170-0839 23:1<89 1990 23 289 https://doi.org/10.1007/BF00983969 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00983969 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nedbal Jan Faculty of Mathematics and Physics, Charles University, CS-180 00, Prague 8, Czechoslovakia aut NATIONALLICENCE 700 1- Štula Martin Faculty of Mathematics and Physics, Charles University, CS-180 00, Prague 8, Czechoslovakia aut NATIONALLICENCE 700 1- Ilavský Michal Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, CS-162 06, Prague 6, Czechoslovakia aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/1(1990-01-01), 89-94 0170-0839 23:1<89 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer