From homogeneous to heterogeneous nucleation of chain molecules under nanoscopic cylindrical confinement

Euntaek Woo, June Huh, Young Gyu Jeong, Kyusoon Shin

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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.

Original languageEnglish
Article number136103
JournalPhysical Review Letters
Volume98
Issue number13
DOIs
Publication statusPublished - 2007 Mar 28
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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