Preparation and comparative evaluation of well-defined fluorinated acrylic copolymer latex and solution for ancient stone protection |
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| Affiliation: | 1. Department of Chemistry, School of Science, Xi’an Jiaotong University, Xi’an 710049, China;2. Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China;1. ETSIT-ISOM, Universidad Politécnica de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain;2. L-NESS, Universitá di Milano-Bicocca,ViaCozzi 53, 20125 Milano, Italy;1. Department of Surgery, East Carolina University, Greenville, North Carolina;2. Department of Cardiovascular Sciences, East Carolina University, Greenville, North Carolina;3. Brody School of Medicine, East Carolina University, Greenville, North Carolina;4. Department of Surgery, University of Rochester, Rochester, New York;1. Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, PR China;2. School of Renewable Energy, North China Electric Power University, Beijing 102206, PR China;3. Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China (USTC), Hefei 230026, PR China;1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Institute for Chemical Physics & Department of Chemistry, School of Science, Xi''an Jiaotong University, Xi''an 710049, China;3. Center for High Pressure Science and Technology Research, Zhengzhou University of Light Industry, Zhengzhou 450002, China & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;1. State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China;2. Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China |
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| Abstract: | In this work the well-defined fluorinated acrylic copolymer latex and solution were prepared by the radical initiated seed emulsion polymerization and solution polymerization, respectively, using the same monomers of dodecafluoroheptyl methacrylate (DFHM), butyl acrylate (BA) and methyl methylacrylate (MMA). The copolymer latex BA/MMA/DFHM was designed as core–shell structure and the copolymer solution poly(BA–MMA–DFHM) was structured with low molecular weight. The chemical and morphology structures as well as the film properties obtained from latex and solution were analyzed and compared by spectroscopic techniques (FT-IR and NMR), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), gel permeation chromatography (GPC), scanning electron microscopy coupled with energy-dispersive X-ray detector (SEM–EDX) and static contact angles (CAs) instrument. Moreover, the BA/MMA/DFHM latex and poly(BA–MMA–DFHM) solution (with 29 wt% of DFHM) were applied onto two kinds of sandstone samples by capillary absorption, and their preliminary protecting efficiency was evaluated. It is demonstrated that the comprehensive performances of BA/MMA/DFHM latex films were quite comparable to those of poly(BA–MMA–DFHM) solution cast films, the latter exhibited a better protective performance. |
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