Explosive dissolution and trapping of block copolymer seed crystallites

Gerald Guerin (), Paul A. Rupar, Ian Manners and Mitchell A. Winnik ()
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Gerald Guerin: University of Toronto
Paul A. Rupar: University of Bristol
Ian Manners: University of Bristol
Mitchell A. Winnik: University of Toronto

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Enhanced control over crystallization-driven self-assembly (CDSA) of coil-crystalline block copolymers has led to the formation of intricate structures with well-defined morphology and dimensions. While approaches to build those sophisticated structures may strongly differ from each other, they all share a key cornerstone: a polymer crystallite. Here we report a trapping technique that enables tracking of the change in length of one-dimensional (1D) polymer crystallites as they are annealed in solution at different temperatures. Using the similarities between 1D polymeric micelles and bottle-brush polymers, we developed a model explaining how the dissolving crystallites reach a critical size independent of the annealing temperature, and then explode in a cooperative process involving the remaining polymer chains of the crystallites. This model also allows us to demonstrate the role of the distribution in seed core crystallinity on the dissolution of the crystallites.

Date: 2018
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DOI: 10.1038/s41467-018-03528-x

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