Molecular Weight Distribution Shape as a Versatile Approach to Tailoring Block Copolymer Phase Behavior,ACS Macro Letters

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Molecular Weight Distribution Shape as a Versatile Approach to Tailoring Block Copolymer Phase Behavior
ACS Macro Letters ( IF 5.1 ) Pub Date : 2018-05-24 00:00:00 , DOI: 10.1021/acsmacrolett.8b00295
Dillon T Gentekos ₁ , Brett P Fors ₁

Affiliation

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 (Đ). 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)-block-poly(2-vinylpyridine) (PS-b-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 Đ. 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.

中文翻译：

分子量分布形状作为调整嵌段共聚物相行为的通用方法

嵌段共聚物的分子量分布 (MWD) 显着影响它们的形态相行为，但利用这些特征作为调整材料性能的手段一直局限于 MWD 宽度或分散度 ( Đ )。整个 MWD 的操作具有通过提供方便且通用的途径来定制聚合物纳米结构来应对这一挑战的巨大潜力。在这里，我们描述了聚（苯乙烯）-嵌段-聚（2-乙烯基吡啶）（PS-b-P2VP）的自组装，其中PS嵌段具有系统地不同的分子量组成。我们发现，控制 MWD 形状、宽度和偏斜，可以在具有相同分子特征的样品中获得不同的形态，包括Đ. 因此，我们说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增加部署。

更新日期：2018-05-24

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