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On the behaviour of supercooled liquids and polymers in nano-confinement

机译:纳米约束中过冷液体和聚合物的行为

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摘要

Size effects play an important role in structural phase transitions, melting transitions, in martensitic materials, glass transitions, etc. Very often the question arises, whether a measured size effect originates from the geometrical confinement itself, or if it appears due to the interaction with the limiting surface. Using dynamic mechanical analysis (DMA) technique we have studied various microphase segregated polymers, molecular glass forming liquids and supercooled water confined in nanoporous silica as well as in biological tissues. Here we show on some selected examples that DMA measurements can be used to study relaxation processes in detail and to disentangle in favourable cases pure pore size effects from effects that are induced by the confining surface.
机译:尺寸效应在结构相变,熔融转变,马氏体材料,玻璃化转变等中起着重要作用。经常会出现这样的问题,即所测量的尺寸效应是否源自几何限制本身,或者是否是由于与金属的相互作用而出现的。极限表面。使用动态力学分析(DMA)技术,我们研究了各种微相分离的聚合物,分子玻璃形成液体和纳米多孔二氧化硅以及生物组织中的过冷水。在这里,我们在一些选定的示例上表明,DMA测量可用于详细研究松弛过程,并在有利的情况下将纯净的孔径效应与约束表面引起的效应区分开。

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