title: Anomaly in dielectric relaxation dispersion of glass-forming alkoxy alcohols.
abstract: The dielectric relaxations in six primary and secondary alkoxy alcohols with varying molecular size and different separation between -O- and hydroxyl group are studied at temperatures around glass transition. The analyses of the apparent full width at half maximum of the main relaxations of the alkoxy alcohols reveal minima in the temperature dependence of the relaxation dispersions. The stretching exponents for the main relaxations of the alkoxy alcohols are also found not to follow the empirical correlations with other dynamic quantities established for generic liquids. A comparison of the relaxation dispersions in the alkoxy alcohols with those in Debye and non-Debye (generic) liquids is presented. The impacts of the β-relaxations on the apparent main relaxation widths are reviewed for molecular glass formers.
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Yanqin
authors.initials: Y
authors.lastname: Gao
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Zeming
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Wenkang
authors.initials: W
authors.lastname: Tu
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Xiangqian
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Tian
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Riping
authors.initials: R
authors.lastname: Liu
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Wang