3 years ago

Amplifying (Im)perfection: The Impact of Crystallinity in Discrete and Disperse Block Co-oligomers

Amplifying (Im)perfection: The Impact of Crystallinity in Discrete and Disperse Block Co-oligomers
Martin H. C. van Son, Bas F. M. de Waal, Anja R. A. Palmans, Brigitte A. G. Lamers, Bas van Genabeek, E. W. Meijer
Crystallinity is seldomly utilized as part of the microphase segregation process in ultralow-molecular-weight block copolymers. Here, we show the preparation of two types of discrete, semicrystalline block co-oligomers, comprising an amorphous oligodimethylsiloxane block and a crystalline oligo-l-lactic acid or oligomethylene block. The self-assembly of these discrete materials results in lamellar structures with unforeseen uniformity in the domain spacing. A systematic introduction of dispersity reveals the extreme sensitivity of the microphase segregation process toward chain length dispersity in the crystalline block.

Publisher URL: http://dx.doi.org/10.1021/jacs.7b08627

DOI: 10.1021/jacs.7b08627

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