Benchmarking the Elastic Modulus of Conjugated Polymers with Nanoindentation
Artikel i vetenskaplig tidskrift, 2025
The elastic modulus is a critical parameter for the design of conjugated polymers for wearable electronics and correlates with electrical and thermal transport. Yet, widely different values have been reported for the same material because of the influence of processing and measurement conditions, including the temperature, mode, direction, and time scale of deformation. Thus, results obtained via different methods are usually not considered to be comparable. Here, disparate techniques from nanoindentation to tensile testing of free-standing films or films on water, buckling analysis, dynamic mechanical thermal analysis, oscillatory shear rheometry, and atomic force microscopy are compared. Strikingly, elastic modulus values obtained for the same batch of regioregular poly(3-hexylthiophene) differ by a factor of less than four, which suggests that an approximate comparison is possible. Considering the small amount of material that is typically available, nanoindentation in combination with creep analysis is identified as a reliable method for probing the elastic modulus of films with widely different elastic moduli ranging from less than 0.1 GPa in the case of a polythiophene with oligoether side chains to several GPa for polymers without side chains. Since films can display anisotropic elastic modulus values, it is proposed that nanoindentation is complemented with an in-plane technique such as tensile testing to ensure a full characterization using different modes of deformation.
Författare
Sri Harish Kumar Paleti
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Shuichi Haraguchi
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Zhiqiang Cao
School of Polymer Science and Engineering
Mariavittoria Craighero
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Joost Kimpel
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Zijin Zeng
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Hot Disk AB
Przemyslaw Sowinski
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Di Zhu
Tillämpad kemi 8.1
Judith Pons I Tarres
Tillämpad kemi 8.1
Youngseok Kim
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Qifan Li
Linköpings universitet
Jun Da Huang
Linköpings universitet
Alexei Kalaboukhov
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Besira Mekonnen Mihiretie
Hot Disk AB
S. Fabiano
Linköpings universitet
Xiaodan Gu
School of Polymer Science and Engineering
Christian Müller
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Universiteit Stellenbosch
Macromolecules
00249297 (ISSN) 15205835 (eISSN)
Vol. In PressElectrical Modulation of Elastic Moduli ELMO
Europeiska kommissionen (EU) (101043417-ELMO), 2022-09-01 -- 2027-08-31.
Hybrid and Organic Thermoelectric Systems (HORATES)
Europeiska kommissionen (EU) (EC/H2020/955837), 2021-03-01 -- 2025-02-28.
Stable Doping of Organic Semiconductors
Knut och Alice Wallenbergs Stiftelse (2022.0034), 2023-07-01 -- 2028-06-30.
Ämneskategorier (SSIF 2025)
Textil-, gummi- och polymermaterial
Teknisk mekanik
Polymerteknologi
Infrastruktur
Myfab (inkl. Nanotekniklaboratoriet)
DOI
10.1021/acs.macromol.4c03081
Relaterade dataset
Benchmarking the Elastic Modulus of Conjugated Polymers with Nanoindentation [dataset]
DOI: https://doi.org/10.5281/zenodo.15030674