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Probing the temperature dependence of the mechanical properties of polymers at the nanoscale with band excitation thermal scanning probe microscopy

机译:用带激发热扫描探针显微镜探测纳米级聚合物力学性能的温度依赖性

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摘要

Understanding local mechanisms for temperature-induced phase transitions in polymers requires quantitative measurements of the thermomechanical behavior, including glass transition and melting temperatures as well as temperature dependent elastic and loss modulus and thermal expansion coefficients in nanoscale volumes. Here, we demonstrate an approach for probing local thermal phase transitions based on the combination of thermal field confinement by a heated SPM probe and multi-frequency thermomechanical detection. The local measurement of the glass transition temperature is demonstrated and the detection limits are established.
机译:了解聚合物中温度引起的相变的局部机理需要对热机械行为进行定量测量,包括玻璃化转变和熔融温度以及与温度相关的弹性和损耗模量以及纳米级体积中的热膨胀系数。在这里,我们展示了一种基于加热SPM探针对热场限制和多频热机械检测相结合的探测局部热相变的方法。演示了玻璃化转变温度的本地测量并确定了检测极限。

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