Regular Papers Organics/Polymers

Journal of Thermal Analysis and Calorimetry

, Volume 90, Issue 1, pp 249-253

First online:

Improved controlled temperature and relative humidity DMA of artists’ acrylic emulsion paint films

Part I
  • B. OrmsbyAffiliated withConservation Department Email author 
  • , G. FosterAffiliated withSmithers Rapra
  • , T. LearnerAffiliated withConservation Department
  • , S. RitchieAffiliated withSchool of Engineering and Computer Science, Exeter University
  • , M. SchillingAffiliated withGetty Conservation Institute

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Abstract

Issues encountered with dynamic mechanical analysis of artists’ acrylic emulsion paint films are presented alongside modifications to improve controlled relative humidity (RH) experiments using isothermal and thermal scanning conditions. Free films of titanium white (PW6) artists’ acrylic emulsion paints were cast as free films and their viscoelastic properties measured using the tensile mode of the dynamic mechanical analyser (DMA). Artists’ acrylic emulsion paints are within their glass transition temperature region at room temperature and are highly responsive to changes in ambient temperature and relative humidity, hence controlling relative humidity during analysis is vital to the successful analysis of these paints.

Keywords

acrylic emulsion dynamic mechanical analysis films paint relative humidity titanium white