JMSC21669 Revised Manuscript.pdf (827.4 kB)
Investigation of the effect of relative humidity on polymers by depth sensing indentation
journal contribution
posted on 2011-08-03, 14:11 authored by Kazim Altaf, Ian A. Ashcroft, Richard J.M. HagueStereolithography (SL) resins absorb varying
amounts of moisture dependent on the relative humidities,
which can significantly affect the mechanical properties. In
this work, the influence of relative humidity (RH) on the
mechanical behaviour of an SL resin is investigated using
depth sensing indentation (DSI). The samples were conditioned
by two methods. In the first method, samples were
pre-conditioned at 33.5, 53.8, 75.3 and 84.5% RH using
saturated salt solutions. These preconditioned samples
were tested at 33.5% RH, using a humidity control unit
(HCU) to control RH in the DSI system. In the second
method, samples were conditioned and tested at 33.5, 53.8,
75.3 and 84.5% RH by regulating humidity in the DSI
system using the HCU. Temperature was kept constant at
22.5 C for the conditioning and DSI testing. It was seen
that hardness and modulus decreased with increasing RH
and conditioning time but recovered significantly when
tested after drying. This study demonstrates that RH needs
to be taken into account during the DSI testing of
polymers.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
ALTAF, K., ASHCROFT, I.A. and HAGUE, R.J.M., 2011. Investigation of the effect of relative humidity on polymers by depth sensing indentation. Journal of Materials Science, 46 (23), pp. 7551-7557.Publisher
© SpringerVersion
- AM (Accepted Manuscript)
Publication date
2011Notes
This article was published in the serial, Journal of Materials Science [© Springer]. The definitive version is available from: http://www.springerlink.com/content/y2g413h8h2l6044m/ISSN
0022-2461;1573-4803Publisher version
Language
- en