Gentekos Dillon T, Fors Brett P
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.
ACS Macro Lett. 2018 Jun 19;7(6):677-682. doi: 10.1021/acsmacrolett.8b00295. Epub 2018 May 24.
The molecular weight distributions (MWDs) of block copolymers significantly impact their morphological phase behavior, but exploiting these features as a means to tune material properties has been limited to the MWD breadth, or dispersity (). Manipulation of the entire MWD has promising potential to address this challenge by providing a convenient and versatile route toward tailoring polymer nanostructure. Herein, we describe the self-assembly of poly(styrene)--poly(2-vinylpyridine) (PS--P2VP) where the PS blocks have systematically deviating compositions of molecular weights. We find that controlling the MWD shape, breadth and skew, afforded access to different morphologies in samples with the same molecular characteristics, including . As such, we illustrate the generality and effectiveness of this strategy and anticipate that it will facilitate the increased deployment of disperse polymer compositions in advanced materials applications.
嵌段共聚物的分子量分布（MWD）对其形态相行为有显著影响，但将这些特征作为调节材料性能的手段目前仅限于MWD的宽度，即分散度（）。通过提供一种便捷且通用的方法来定制聚合物纳米结构，对整个MWD进行调控具有解决这一挑战的巨大潜力。在此，我们描述了聚苯乙烯-聚（2-乙烯基吡啶）（PS-P2VP）的自组装，其中PS嵌段的分子量组成存在系统偏差。我们发现，控制MWD的形状、宽度和偏差，可以在具有相同分子特征的样品中获得不同的形态，包括。因此，我们阐明了该策略的普遍性和有效性，并预计它将促进分散聚合物组合物在先进材料应用中的更多应用。
