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Damage function for poly(vinyl chloride) in heritage collections
ID Rijavec, Tjaša (Author), ID Strlič, Matija (Author), ID Kralj Cigić, Irena (Author)

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Abstract
Yellowing of plastic objects as a consequence of chemical degradation is a common heritage conservation challenge. In the case of poly(vinyl chloride) elimination of hydrogen chloride leads to the formation of polyene sequences that act as chromophores. The objective of this work was to quantitatively evaluate the rate of degradation observed as yellowing, as relevant to room conditions during long-term storage of heritage collections. Degradation was quantified as increase in the b* colour coordinate during accelerated degradation at 50 and 70 °C as a function of temperature, relative humidity, plasticizer content, and polymer molecular weight. The significance of each variable was investigated with multiple linear regression. Lower temperature, lower relative humidity, higher polymer molecular weight and higher plasticizer content were associated with lower degradation rates. The activation energy of 86 kJ/mol was calculated. The concept of ‘1- °C-equivalent’ is introduced to enable variable prioritisation from a heritage management aspect. The resulting model can be used to shape environmental management guidelines and identify the most vulnerable objects in heritage collections.

Language:English
Keywords:damage function, PVC, heritage science, degradation, prediction, additives
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Publication status:Published
Publication version:Version of Record
Year:2023
Number of pages:9 str.
Numbering:Vol. 211, art. 110329
PID:20.500.12556/RUL-145890 This link opens in a new window
UDC:543:678.743.2:7.025
ISSN on article:0141-3910
DOI:10.1016/j.polymdegradstab.2023.110329 This link opens in a new window
COBISS.SI-ID:146266371 This link opens in a new window
Publication date in RUL:17.05.2023
Views:609
Downloads:102
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Record is a part of a journal

Title:Polymer degradation and stability
Shortened title:Polym. degrad. stab.
Publisher:Elsevier
ISSN:0141-3910
COBISS.SI-ID:2814212 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:funkcija škode, PVC, dediščinska znanost, degradacija, napoved, aditivi

Projects

Funder:EC - European Commission
Funding programme:H2020
Project number:814496
Name:Active & intelligent PAckaging materials and display cases as a tool for preventive conservation of Cultural Heritage
Acronym:APACHE

Funder:ARRS - Slovenian Research Agency
Project number:N1-0241
Name:PVCare - strategije za preventivno konserviranje dediščine iz poli(vinil klorida)

Funder:Other - Other funder or multiple funders
Funding programme:Poland, National Science Centre (NCN)
Project number:2020/39/I/HS2/00911
Acronym:OPUS-LAP 20

Funder:ARRS - Slovenian Research Agency
Project number:P1-0153
Name:Raziskave in razvoj analiznih metod in postopkov

Funder:Other - Other funder or multiple funders
Funding programme:E-RIHS.si

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