Non-ideality of polymer melts confined to nanotubes N.-K. Lee, J. Farago, H. Meyer, J. P. Wittmer, J. Baschnagel, S. P. Obukhov and A. Johner EPL, 93 4 (2011) 48002 Published online: 28 February 2011 DOI: 10.1209/0295-5075/93/48002