Dynamic Mechanical Analysis of Polymer Thin Films Using a Kirigami-Inspired Support,ACS Macro Letters

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Dynamic Mechanical Analysis of Polymer Thin Films Using a Kirigami-Inspired Support
ACS Macro Letters ( IF 5.1 ) Pub Date : 2021-08-16 , DOI: 10.1021/acsmacrolett.1c00396
Salma Siddika ₁ , Nrup Balar ₂ , Ronald E Booth ₂ , Brendan T O'Connor ₂

Affiliation

A method of determining the mechanical relaxation behavior of polymer thin films is presented that employs a kirigami-inspired sample support. The film of interest is placed on the kirigami support and loaded into a dynamic mechanical analyzer. When the composite is placed in tension, the substrate effectively transfers the load to the film of interest. We demonstrate the approach using a number of polymers and conjugated polymer: small molecule blends relevant for organic photovoltaics. The kirigami-inspired method is found to provide an accurate view of thermal relaxation behavior in polymer thin films, including a quantitative assessment of the film storage modulus. The method is particularly valuable in thin films where film morphology is highly dependent on processing conditions. We show that differences in casting conditions have a clear impact on the thermal relaxation of both the neat and blend conjugated polymer films.

中文翻译：

使用 Kirigami 启发支持的聚合物薄膜的动态力学分析

提出了一种确定聚合物薄膜的机械弛豫行为的方法，该方法采用了一种受剪纸启发的样品支架。感兴趣的胶片被放置在剪纸支架上并加载到动态机械分析仪中。当复合材料处于张力状态时，基材有效地将负载转移到感兴趣的薄膜上。我们展示了使用多种聚合物和共轭聚合物的方法：与有机光伏相关的小分子混合物。发现剪纸启发的方法可以提供聚合物薄膜中热弛豫行为的准确视图，包括对薄膜储能模量的定量评估。该方法在薄膜形态高度依赖于加工条件的薄膜中特别有价值。

更新日期：2021-09-21

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