当前位置: X-MOL 学术Polym. Test. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Nanoindentation of polyurethane with phase-separated fibrillar structure
Polymer Testing ( IF 5.1 ) Pub Date : 2020-12-21 , DOI: 10.1016/j.polymertesting.2020.107038
Ilya A. Morozov

Polyurethane elastomer is investigated by atomic force microscopy (AFM) in a regime of fast nanoindentation (simultaneous getting relief and mechanical properties of the surface). The hard phase of the polymer has a fibrillar structure and inhomogeneously distributed in the softer matrix. The surface is covered by a nanolayer of the soft phase and the obtained relief depends on the depth of indentation: it is necessary to pierce this outer layer to reach the internal fibrillar structure of the polymer. The rate of indentation is not constant and affected by the spring properties of AFM-probe, local phase composition and the depth of indentation. Analysis of the kinetics of the probe-surface interactions allowed to determine the thickness of the outer layer and to establish relationships between the indentation rate and elastic and dissipative properties of the soft and hard regions of the polyurethane surface.



中文翻译:

具有相分离纤维结构的聚氨酯纳米压痕

聚氨酯弹性体通过原子力显微镜(AFM)在快速纳米压痕(同时获得表面凹凸和机械性能)的范围内进行研究。聚合物的硬相具有纤维状结构,并且不均匀地分布在较软的基质中。该表面被柔软相的纳米层覆盖,并且获得的浮雕取决于压痕的深度:有必要刺穿该外层以达到聚合物的内部原纤维结构。压痕速率不是恒定的,并且受AFM探针的弹簧特性,局部相组成和压痕深度的影响。

更新日期:2020-12-21
down
wechat
bug