[1] [1] Yu X, Gong Y X, Tan P P, et al. Journal of Cultural Heritage, 2017, 25: 185.

[3] [3] Koperska M A, ojewski T, ojewska J. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015, 135: 576.

[4] [4] Zhang X N, Gong D C, Gong Y X. Journal of Cultural Heritage, 2019, 38: 53.

[7] [7] Zorpas A A, Skouroupatis A. Sustainable Cities and Society, 2016, 20: 52.

[8] [8] Hu T F, Jia W T, Cao J J, et al. Atmospheric Environment, 2015, 123(Part B): 449.

[11] [11] Akyuz S, Akyuz T, Cakan B, et al. Journal of Molecular Structure, 2014, 1073: 37.

[12] [12] Liu J, Guo D H, Zhou Y, et al. Journal of Archaeological Science, 2011, 38(7): 1763.

[15] [15] Numata K, Sato R, Yazawa K, et al. Polymer, 2015, 77: 87.

[16] [16] Koperska M A, Pawcenis D, Milczarek J M, et al. Polymer Degradation and Stability, 2015, 120: 357.

[17] [17] Morin A, Alam P. Materials Science and Engineering C, 2016, 65: 215.

[18] [18] Koh L D, Cheng Y, Teng C P, et al. Progress in Polymer Science, 2015, 46: 86.

[19] [19] Koperska M A, Pawcenis D, Bagniuk J, et al. Polymer Degradation and Stability, 2014, 105: 185.