Impact of climatic ageing on the basic mechanical properties of viscoelastic sealants

0464343 - ÚTAM 2018 RIV CH eng C - Conference Paper (international conference)
Minster, Jiří - Šašek, Petr
Impact of climatic ageing on the basic mechanical properties of viscoelastic sealants.
Defect and Diffusion Forum. Vol. 368. Zürich: Trans Tech Publications, 2016 - (Louda, P.), s. 182-185. ISBN 978-3-03835-720-9.
[International Conference on Local Mechanical Properties/12./. Liberec (CZ), 04.11.2015-06.11.2015]
R&D Projects: GA MK(CZ) DF12P01OVV017
Keywords : climatic ageing * mechanical properties * microindentation * polymer sealants * repair of mosaics
OECD category: Materials engineering
http://www.scientific.net/DDF.368.182

The aim of the research presented here was to assess the influence of climatic loading on the basic mechanical properties of polymer sealants, from the viewpoint of their application in creating and repairing outdoor mosaics. Six promising sealants were selected for the measurements. They were tested in their native state and also after four different model types of physical-chemical ageing were applied. We used a combination of ultra-violet radiation with the influence of enhanced temperature, moisture and also soaking in water and freezing. The Hysitron TI 750D TriboIndeterTM system, equipped with a Berkovich indenter, was used for tests. The basic mechanical characteristics were measured using the Basic QS Trapezoid quasi-static mode. Time-dependent properties of the sealants were assessed by the indentation creep method. The results have confirmed that microindentation technique offers a suitable methodology for assessing changes in the basic mechanical time-dependent properties of the tested sealants due to photo-degradation processes and climatic effects.
Permanent Link: http://hdl.handle.net/11104/0263260