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Synthesis and characterization of a silicone resin with silphenylene units in Si‐O‐Si backbones
Author(s) -
Jia Mengqiu,
Wu Chaobo,
Li Wei,
Gao Dahai
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30635
Subject(s) - silicone , materials science , silicone resin , scanning electron microscope , fourier transform infrared spectroscopy , gel permeation chromatography , polymer chemistry , condensation polymer , polymer , composite material , chemical engineering , nuclear chemistry , coating , chemistry , engineering
A silicone resin with silphenylene units in Si‐O‐Si backbones was synthesized by hydrolysis‐polycondensation of 1,4‐bis(hydroxydimethylsilyl)benzene (BHB) with chlorosilanes. The structure and property of this novel silicone resin were characterized by gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), thermogarvimetric analysis (TG), scanning electron microscope (SEM), and electrochemical impedance spectrum (EIS). This silicone resin could be applied as the film forming material of coating when it is prepared under the condition of R/Si, Ph/R, and the content of silphenylene units being 1.3, 0.5, and 10 mol %, respectively. GPC, IR, and NMR results show that the silphenylene units have been incorporated into the polymer of silicone resin. The TG analysis indicates that this novel silicone resin has good heat resistance with the onset degradation temperature of 500.3°C and residual weight of 85.6% at 900°C. SEM results demonstrate that the silicone resin with silphenylene units can form full and uniform films, and its surface morphology of clear paints were not damaged by heat below 350°C. EIS analysis reveals that clear paints of the silicone resin with silphenylene units have good resistance to corrosion. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009