Toivo Kärnä
Neste Oil
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Featured researches published by Toivo Kärnä.
Synthetic Metals | 1993
H. Isotalo; M. Ahlskog; H. Stubb; Jukka Laakso; Toivo Kärnä; M. Jussila; J.-E. Österholm
Abstract Electrically conducting poly(3-octylthiophene) (POT) and blends thereof have been processed and analyzed. Processing was done by extrusion using POT as the electrically active component the insulating polymer matrix being EVA, PE, PP, PS or PB. For these basic studies the in situ doping was done by I2, FeCl3 and sulfonic acid. Room temperature conductivity was used to probe the percolation of the conductivity as a function of matrix and dopant concentration. The measured conductivities varied between those of the insulating matrices and 1·10 −2 Ω −1 cm −1 . The long term stability of the conductivity was measured in various atmospheres at room temperature as well as elevated temperatures. The effect of stabilizers was also studied.
Archive | 1992
Toivo Kärnä; Jukka Laakso; Kalle Levon; Esko Savolainen
Archive | 1992
Toivo Kärnä; Jukka Laakso; Timo Niemi; Heikki Ruohonen; Esko Savolainen; Helge Lindstrom; Esa Virtanen; Olli Ikkala; Alejandro Andreatta
Archive | 2000
Valery Pavlyuchenko; Sergey Stepanovich Ivanchev; Olga Sorochinskaya; Mikael Skrifvars; Jukka Koskinen; Hanna Laamanen; Toivo Kärnä
Archive | 1989
Toivo Kärnä; Jukka-Pekka Nieminen; Asko Mäisti; Hannu Kähönen
Archive | 1992
Toivo Kärnä; Jukka Laakso; Kalle Levon; Esko Savolainen
Archive | 2000
Mikael Skrifvars; Toivo Kärnä; Jukka Koskinen; Hanna Laamanen; Nikitas Katsaras
Archive | 1994
Toivo Kärnä; Jukka Laakso; Timo Niemi; Heikki Ruohonen; Esko Savolainen; Helge Lindstrom; Esa Virtanen; Olli Ikkala
Archive | 1989
Toivo Kärnä; Frey Fredenberg; Timo Niemi; Matti Luukka; Jukka-Pekka Nieminen
Archive | 2000
Matti Jussila; Toivo Kärnä; Jukka Koskinen; Ilkka Turunen; Samuli Puhakka
