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Synthesis, testing and application of moisture-curable polyurethane as a consolidant for fragile organic cultural objects.
- Source :
-
Journal of Adhesion Science & Technology . Nov2018, Vol. 32 Issue 22, p2421-2428. 8p. 1 Black and White Photograph, 2 Graphs. - Publication Year :
- 2018
-
Abstract
- To preserve fragile organic cultural objects in humid archaeological excavation sites, a moisture-curable polyurethane (MCPU) as a consolidant was synthesized and employed. Relevant instruments were utilized to test properties such as colour, transmittance, mechanical properties, hydrophobicity and ageing resistance. Furthermore, residues of Zhusi, a vessel made of plant fibres excavated in archaeological sites, were consolidated. The results illustrated that MCPU cured for 12 h formed transparent, colourless and flexible films. The transmittance of the cured films was over 80% in the wavelength range of 400-1100 nm. The tensile strength was 1.419 MPa, and the elongation rate was more than 1500%. The thermal ageing equation is lg τ = 5383.6639/T − 12.5728 (τ is the lifetime of the samples in hours and T is the thermodynamic temperature in K), meaning that at 15 °C, its lifetime is approximately 147 years. The Zhusi consolidation experiment showed that the mechanical properties were improved and deteriorated fibres were perfectly bonded, and the separated and broken fibres formed a complete structure without significant variation in appearance. Therefore, MCPU can be used as a consolidant for fragile organic cultural objects in very humid archaeological excavation sites. This work solves the problem of conservation of fragile organic objects in humid environments. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01694243
- Volume :
- 32
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Journal of Adhesion Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 134057154
- Full Text :
- https://doi.org/10.1080/01694243.2018.1481494