PMSE 37 |
| In 1938 Storks suggested “the gutta-percha macromolecule may possibly fold by a mechanism of rotation around single bonds”. In the 1950-1960s Keller, Geil and others demonstrated the widespread impact of chain folding in the by now familiar solution-grown polymer single crystals and more importantly, in the lamellar architecture of melt-crystallized polymers, The molecular continuity between crystalline and amorphous parts of the lamella is the most original feature of chain folding, not observed in conventional crystalline systems. Polymer single crystals help analyze out of reach features associated with chain folding, through consequences on crystal structure, crystallization processes, lamellar architecture, etc. Contributions from our and other laboratories will highlight structural aspects linked with the molecular continuity between the crystalline core and the fold surface, i.e. will deal with the impact of the crystal structure on the folds, and reciprocally of the folds on the crystal and lamellar structure and morphology. |
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50 Years after the Discovery of Polymer Single Crystals: A Look Back, Current Discoveries and Future Opportunities
8:30 AM-11:55 AM, Sunday, August 19, 2007 Westin Boston Waterfront -- Alcott, Oral
Division of Polymeric Materials: Science & Engineering |