Comprehensive investigation of the viscoelastic properties of PMMA by nanoindentation

Polymer Testing

Gernot Oreski¹  Caterina Czibula²  Michael Berer³  Gerald Pinter⁴  Petra Christöfl⁴  Christian Teichert⁴ 

[1] Christian Doppler Laboratory for Fiber Swelling, Graz University of Technology, Infeldgasse 23, 8010, Graz, Austria;Corresponding author.;Institute of Physics, Montanuniversitaet Leoben, Franz- Josef-Str. 18, 8700, Leoben, Austria;Polymer Competence Center Leoben, Roseggerstrasse 12, 8700, Leoben, Austria;

关键词: Nanoindentation;    Amorphous;    Creep;    AFM;    Compression test;   

DOI  :  

来源: DOAJ

【 摘 要 】

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 E0 and the infinitely elastic modulus E∞ from nanoindentation creep curves. The value of E0 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 E0 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.

【 授权许可】

Unknown