title: Glass-Forming Tendency of Molecular Liquids and the Strength of the Intermolecular Attractions.
abstract: When we cool down a liquid below the melting temperature, it can either crystallize or become supercooled, and then form a disordered solid called glass. Understanding what makes a liquid to crystallize readily in one case and form a stable glass in another is a fundamental problem in science and technology. Here we show that the crystallization/glass-forming tendencies of the molecular liquids might be correlated with the strength of the intermolecular attractions, as determined from the combined experimental and computer simulation studies. We use van der Waals bonded propylene carbonate and its less polar structural analog 3-methyl-cyclopentanone to show that the enhancement of the dipole-dipole forces brings about the better glass-forming ability of the sample when cooling from the melt. Our finding was rationalized by the mismatch between the optimal temperature range for the nucleation and crystal growth, as obtained for a modeled Lennard-Jones system with explicitly enhanced or weakened attractive part of the intermolecular 6-12 potential.
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: Kajetan
authors.initials: K
authors.lastname: Koperwas
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: Karolina
authors.initials: K
authors.lastname: Adrjanowicz
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: Zaneta
authors.initials: Z
authors.lastname: Wojnarowska
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Jedrzejowska
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: Justyna
authors.initials: J
authors.lastname: Knapik
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: Marian
authors.initials: M
authors.lastname: Paluch