Damage function for poly(vinyl chloride) in heritage collections
| العنوان: | Damage function for poly(vinyl chloride) in heritage collections |
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| المؤلفون: | Tjaša Rijavec, Matija Strlič, Irena Kralj Cigić |
| المصدر: | Polymer degradation and stability, vol. 211, 110329, 2023. Polymer degradation and stability, str. 1-9 : Ilustr., Vol. 211, May 2023 COBISS-ID: 2814212 |
| بيانات النشر: | Elsevier, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | udc:543:678.743.2:7.025, funkcija škode, PVC, dediščinska znanost, degradacija, napoved, aditivi, Polymers and Plastics, damage function, udc:543, 678, damage function, PVC, heritage science, degradation, prediction, additives, prediction, dediščinska znanost, Condensed Matter Physics, PVC, funkcija škode, Mechanics of Materials, aditivi, Materials Chemistry, additives, heritage science, degradacija, napoved, degradation |
| الوصف: | 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. |
| وصف الملف: | application/pdf; text/url |
| اللغة: | English |
| تدمد: | 0141-3910 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc124826cc022502d6ad1ebaf9fbee64 https://hdl.handle.net/20.500.12556/RUL-145890 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....cc124826cc022502d6ad1ebaf9fbee64 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 01413910 |
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