Direct Tensile Testing of Free-Standing Ultrathin Polymer Films on Liquid Surface at High Temperature.

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Tae-Ik Lee, Ji Hun Kim, Eun Sung Oh, Taek-Soo Kim
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引用次数: 0

Abstract

The fragile nature of ultrathin polymer films poses a challenge for precise mechanical property measurements in a free-standing state, despite their critical importance for the fabrication and performance of advanced electronic devices under thermal loading. Here, a novel high-temperature tensile testing method for free-standing ultrathin polymer films using a film on heated liquid (FOHL) platform is proposed. Glycerol is chosen for the thermally stable liquid platform for its high surface tension, high boiling point, miscibility with water, and chemical stability. A defect healing process of the specimen on the heated liquid effectively eliminates preexisting defects of the brittle polymer sample, enabling precise tensile property measurements at elevated temperatures. The methodology is validated through experiments on polystyrene (PS) films of varying thicknesses (50-400 nm) at elevated temperatures of 25-100 °C, demonstrating the influence of temperature and thickness on tensile properties. Decreasing elastic modulus with increasing temperature and decreasing thickness of ultrathin PS films is accurately measured. The proposed method provides a reliable method todirectly evaluate the tensile properties of ultrathin films in high-temperature conditions.

液体表面独立超薄聚合物薄膜的高温直接拉伸测试
尽管超薄聚合物薄膜在热负荷下对先进电子设备的制造和性能至关重要,但其脆弱的性质给独立状态下的精确机械性能测量带来了挑战。本文提出了一种利用加热液体薄膜(FOHL)平台进行独立超薄聚合物薄膜高温拉伸测试的新方法。由于甘油具有高表面张力、高沸点、与水的混溶性和化学稳定性,因此被选为热稳定液体平台。试样在加热液体上的缺陷愈合过程可有效消除脆性聚合物试样中预先存在的缺陷,从而在高温下进行精确的拉伸性能测量。通过在 25-100 °C 高温下对不同厚度(50-400 nm)的聚苯乙烯(PS)薄膜进行实验,验证了该方法,证明了温度和厚度对拉伸性能的影响。精确测量到了超薄 PS 薄膜的弹性模量随温度升高和厚度减小而减小。所提出的方法为间接评估超薄薄膜在高温条件下的拉伸性能提供了一种可靠的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Small Methods
Small Methods Materials Science-General Materials Science
CiteScore
17.40
自引率
1.60%
发文量
347
期刊介绍: Small Methods is a multidisciplinary journal that publishes groundbreaking research on methods relevant to nano- and microscale research. It welcomes contributions from the fields of materials science, biomedical science, chemistry, and physics, showcasing the latest advancements in experimental techniques. With a notable 2022 Impact Factor of 12.4 (Journal Citation Reports, Clarivate Analytics, 2023), Small Methods is recognized for its significant impact on the scientific community. The online ISSN for Small Methods is 2366-9608.
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