Abstract Instrumented nanoindentation (NI) was used to examine the viscoelastic properties of poly(methyl methacrylate) (PMMA) as an amorphous polymer model. An evaluation combining adhesive contact and empiric spring–dashpot models has been applied to obtain the instantaneous elastic modulus E 0 and the infinitely elastic modulus E ∞ from nanoindentation creep curves. The value of E 0 has been compared to moduli obtained with atomic force microscopy-based nanoindentation (AFM-NI) and compression tests. Furthermore, the elastic modulus has been evaluated by the method introduced by Oliver and Pharr ( O & P ) for the NI and AFM-NI results. Comparison of the elastic modulus E 0 from the creep measurements of NI and AFM-NI to compression tests reveals good agreement of the results. However, only the O & P based AFM-NI results yield to lower values.

中文翻译：

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通过纳米压痕全面研究 PMMA 的粘弹性

摘要 仪器纳米压痕 (NI) 用于检测作为无定形聚合物模型的聚甲基丙烯酸甲酯 (PMMA) 的粘弹性。结合粘合剂接触和经验弹簧-缓冲器模型的评估已被应用于从纳米压痕蠕变曲线中获得瞬时弹性模量 E 0 和无限弹性模量 E ∞ 。已经将 E 0 的值与通过基于原子力显微镜的纳米压痕 (AFM-NI) 和压缩测试获得的模量进行了比较。此外，弹性模量已通过 Oliver 和 Pharr (O&P) 为 NI 和 AFM-NI 结果引入的方法进行评估。将 NI 和 AFM-NI 蠕变测量的弹性模量 E 0 与压缩测试进行比较，结果显示出良好的一致性。然而，只有 O&