title: From homogeneous to heterogeneous nucleation of chain molecules under nanoscopic cylindrical confinement.
abstract: The crystallization of monodisperse linear polyethylene confined in nanoporous alumina is investigated with the calorimetric measurements. We observe a drastic change in crystallization behavior, specifically nucleation, with a decrease in the pore diameter. Crystallization in relatively larger pores with the diameters of 62 and 110 nm occurs at lower temperatures within a very narrow range, whereas crystallization in smaller pores with diameters of 15-48 nm occurs at a higher and broad range of temperatures. Nucleation and crystallization kinetics in nanopores is discussed based on classical nucleation theory as well as the Avrami theory.
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, South Korea.
authors.forename: Euntaek
authors.initials: E
authors.lastname: Woo
authors.forename: June
authors.initials: J
authors.lastname: Huh
authors.forename: Young Gyu
authors.initials: YG
authors.lastname: Jeong
authors.forename: Kyusoon
authors.initials: K
authors.lastname: Shin