Study on enthalpy relaxation of glassy polystyrene using a structure-dependent Kohlrausch stretch exponent combined with coupling modelGuodong Liu, Yang Zuo, Jingjing Lin and Dongmei ZhaoEur. Phys. J. E, 37 7 (2014) 63DOI: https://doi.org/10.1140/epje/i2014-14063-8