ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Preparation and artificial ageing tests in stone conservation of fluorosilicone vinyl acetate/acrylic/epoxy polymers

Xiao-Ying Zhang, Wen-Ya Wen, Han-Qiang Yu, Qian Chen, Ji-Cheng Xu, Dong-Ya Yang, and Feng-Xian Qiu

School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China

E-mail: fxqiuchem@163.com

Abstract: In this work, a series of fluorosilicone vinyl acetate/acrylic/epoxy (FVAE) polymers for protection of stone relics were prepared with different content of hexafluorobutyl methacrylate (HFBMA) by the seed emulsion polymerization process. Properties and structure of FVAE materials were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), and transmission electron microscopy (TEM). Viscosity, particle size, surface tension, gel content, adhesion and surface hardness of polymer materials were also determined. Surface morphology of the stone sample was observed by scanning electron microscopy (SEM). Compared with a commercial copolymer, ethyl methacrylate/methyl acrylate (EM/MA, Paraloid B72), protection ability of the prepared FVAE polymer was investigated using artificial ageing tests such as the freeze-thaw aging test, acid aging test and the soluble salts aging test. It was found that the FVAE polymers prepared can effectively prevent corrosion caused by H⁺, formation of an interface crack and further weathering, which indicates their possible application in stone protection.

Keywords: stone relics; conservation; fluorosilicone polymer; epoxy; artificial ageing test

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2016-0095

Chemical Papers 70 (12) 1621–1631 (2016)