The mobility of the amorphous phase in polyethylene as a determining factor for slow crack growth Y. F. Men, J. Rieger, H. -F. Enderle and D. Lilge Eur. Phys. J. E, 15 4 (2004) 421-425 Published online: 06 December 2004 DOI: 10.1140/epje/i2004-10059-3