期刊
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
卷 51, 期 8, 页码 639-645出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/10601325.2014.924837
关键词
POSS; addition-type; silicone rubber; hybrid; thermal properties; mechanical properties
1,3,5,7,9,11,13-heptaphenyl-15-vinyl cage half siloxane (Phenyl-Vinyl-POSS) was synthesized via the corner capping reaction of incompletely condensed silsesquioxane, [(C6H5)(7)Si7O9(OH)(3)], with trichlorovinylsilane. The chemical structure of Phenyl-Vinyl-POSS was characterized by FT-IR, H-1-NMR, mass spectrometry and elemental analysis. Phenyl-Vinyl-POSS / ATC silicone rubber organic-inorganic hybrid materials were prepared by hydrosilylation between Phenyl-Vinyl-POSS and addition-type curable (ATC) silicone rubber with karstedt platinum catalyst. These hybrid materials were characterized through SEM, IR, XRD, TGA, DSC and tensile test. The results indicate that Phenyl-Vinyl-POSS is successfully incorporated into silicone rubber matrix by chemical bonding. Both mechanical properties and thermal properties of Phenyl-Vinyl-POSS / ATC silicone rubber hybrid materials have been improved compared to neat silicone rubber. The hardness of Phenyl-Vinyl-POSS / ATC silicone rubber hybrid materials increases from 18A to 28A, tensile strength increases from 0.2 MPa to 0.64 MPa, and the elongation at break increases from 14.12% to 184.39% when Phenyl-Vinyl-POSS content is up to 10 wt%. Meanwhile, temperature with 5% decomposition of modified ATC silicone rubber increases from 344.1 degrees C to 360.4 degrees C.
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