Study on the Viscoelastic Properties of the Epoxy Surface by means of Nano-Dynamic Mechanical Analysis
Blekinge Institute of Technology, School of Engineering, Department of Mathematics and Natural Sciences2008 (English)In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 46, no 3, 281-288 p.Article in journal (Refereed) Published
The viscoelastic properties of the epoxy surface have been investigated by nano-dynamic mechanical analysis (nano-DMA). Both a Berkovich tip and a conospherical tip were used under the condition of different forces (i.e. different penetration depths) in the frequency range of 10–200 Hz. Loss tangent and storage modulus are characteristics that describe the viscoelastic properties. The effect of force frequency, penetration depth and tip shape on the viscoelastic properties is studied and discussed according to the features of microstructures and mobility of molecular chains. The experimental results show important variations when the penetration depth is shallow (<30 nm). As the depth becomes deeper, the results tend to be stable and become almost constant over 120nm. The two kinds of indenter tip can cause a slight difference of the storage modulus. A “master curve” of the storage modulus as a function of force frequency is established.
Place, publisher, year, edition, pages
Wiley periodicals, Inc. , 2008. Vol. 46, no 3, 281-288 p.
epoxy, nano-DMA, surface, viscoelastic properties
IdentifiersURN: urn:nbn:se:bth-8614DOI: 10.1002/polb.21365ISI: 000252906000007Local ID: oai:bth.se:forskinfo9474952BA59DDB63C125740B00476308OAI: oai:DiVA.org:bth-8614DiVA: diva2:836356