Nanoscale dynamic mechanical analysis (nanoDMA) was used to determine changes in surface viscoelastic properties of low-density polyethylene (LDPE) due to Ar plasma treatment. The experimental results show that the exposure of LDPE to high-power plasma produces a more solid-like response compared to low-power plasma. In addition, high-power plasma treatment results in permanent modification of the near-surface microstructure of LDPE, while low-power plasma treatment yields a microstructure that exhibits time-dependent viscoelastic properties. The results of this study show that nanoDMA is an effective method for evaluating changes in surface viscoelastic properties of polymers due to modification of the near-surface microstructure by inert plasma treatment.

纳米级动态力学分析（nanoDMA）用于确定由于Ar等离子体处理而导致的低密度聚乙烯（LDPE）表面粘弹性的变化。实验结果表明，与低功率等离子体相比，LDPE暴露于高功率等离子体会产生更像固体的响应。另外，高功率等离子体处理导致LDPE的近表面微观结构的永久改变，而低功率等离子体处理产生的微观结构表现出随时间变化的粘弹性。这项研究的结果表明，nanoDMA是评估聚合物表面粘弹性性质变化的有效方法，该变化是由于惰性等离子体处理对近表面微观结构的影响。