Authors A. Röttele, T. Thurn-Albrecht, J.-U. Sommer and G. Reiter
Title Thermodynamics of Formation, Reorganization and Melting of Confined Nanometer-sized Polymer Crystals
Date 25.01.2003
Number 117
Abstract We studied the thermodynamic properties of a large ensemble of polymer crystals confined in the spherical cells of a block copolymer mesostructure. Nucleated only at large supercoolings, the resulting highly imperfect crystallites showed significant reorganization upon heating. A broad melting range is caused by the superposition of sharp melting transitions of the individual crystals, which take place at different temperatures corresponding to a multitude of possible metastable states. Thus, at the limit of their stability, individual nanocrystals only have the choice between complete melting or stabilization by reorganization taking place entirely in the crystalline state. As a consequence of their smallness, melting-recrystallization processes within the individual cells are prohibited.
Publisher Macromolecules
Citation Macromolecules 36 (2003) 1257-1260

Back to list