Cross-infection effect of polymers of historic and heritage significance on the degradation of a cellulose reference test material

Katherine Curran, Alenka Možir, Mark Underhill, Lorraine T. Gibson, Tom Fearn, Matija Strlič

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Abstract

The cross-infection effect of 105 polymer samples was studied, using cellulose as a reference test material. In total 14 polymer types were studied, comprising “modern materials” commonly found in historic and artistic collections including: cellulose acetate (CA), cellulose nitrate (CN), poly(vinyl chloride) (PVC), polyurethane (PUR) and a selection of specialised packaging materials used in art and heritage conservation. Polymer samples were placed in glass vials containing a piece of the cellulose reference and vials were sealed before being heated to 80 C for 14 days. The cross-infection effect on the reference cellulose was measured using viscometry to calculate the degree of polymerisation relative to that of a control reference and a classification system of the cross-infection or preservation effect is proposed. Solid phase micro-extraction (SPME)-GC/MS was used to detect and identify the emitted volatile organic compounds (VOCs) from a select number of polymer samples. CN was identified as the polymer with the most severe cross-infection effect while others e.g. polycarbonate (PC) had no effect or even a beneficial effect. Acetic acid was found to be the most characteristic emission detected from the most severely cross-infecting materials.
Original languageEnglish
Pages (from-to)294–306
Number of pages13
JournalPolymer Degradation and Stability
Volume107
Early online date18 Dec 2013
DOIs
Publication statusPublished - Sep 2014

Keywords

  • cross-infection
  • volatile organic compounds
  • gas chromatography
  • heritage conservation

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