Jump to main content
Jump to site search

Issue 20, 2018
Previous Article Next Article

Discrete oligodimethylsiloxane–oligomethylene di- and triblock co-oligomers: synthesis, self-assembly and molecular organisation

Author affiliations

Abstract

A new class of discrete-length block co-oligomers comprising oligodimethylsiloxane (oDMS) and oligomethylene (oM) is presented. For this, oM blocks containing up to 69 backbone carbons are synthesised via an iterative, Wittig reaction-based strategy. Ligation with oDMS hydrides permits the formation of a library of block co-oligomers (BCOs) in which the block configuration, MW, and composition can be tuned. Differential scanning calorimetry and small-angle X-ray scattering show that all BCOs exhibit microphase separation into well-ordered lamellar morphologies, driven by the crystallisation of the oM blocks. Pre-melting order–order transitions are present for a number of BCOs, resulting in an alteration of the oM crystal packing as well as in changes of the overall microphase-segregated structure. As a result of the discrete nature of the BCO chains, we propose models that describe the molecular organisation within the microphase-segregated structures by evaluating the changes in the lamellar thickness upon varying the BCO architecture.

Graphical abstract: Discrete oligodimethylsiloxane–oligomethylene di- and triblock co-oligomers: synthesis, self-assembly and molecular organisation

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Mar 2018, accepted on 17 Apr 2018 and first published on 19 Apr 2018


Article type: Paper
DOI: 10.1039/C8PY00355F
Citation: Polym. Chem., 2018,9, 2746-2758
  •   Request permissions

    Discrete oligodimethylsiloxane–oligomethylene di- and triblock co-oligomers: synthesis, self-assembly and molecular organisation

    B. van Genabeek, B. F. M. de Waal, A. R. A. Palmans and E. W. Meijer, Polym. Chem., 2018, 9, 2746
    DOI: 10.1039/C8PY00355F

Search articles by author

Spotlight

Advertisements