Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 52, Issue 6, Pages 780-788Publisher
WILEY
DOI: 10.1002/pola.27058
Keywords
dielectric properties; double-decker-shaped silsesquioxane (DDSQ); high performance polymers; macromonomers; nanocomposites; polysiloxanes; surface hydrophobicity; WAXS
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Funding
- International Science and Technology Cooperation program of China [2012DFR50300]
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A series of copoly(aryl ether sulfone)s containing double-decker-shaped silsesquioxane (DDSQ) in the main chain was prepared. Toward this end, a novel diphenol polyhedral oligomeric silsesquioxane macromer was synthesized by hydrosilylation between 3,13-dihydro octaphenyl double-decker silsesquioxane (denoted dihydro DDSQ) and eugenol. The poly(aryl ether sulfone)s were synthesized from diphenol DDSQ, bisphenol A (BPA), and 4-fluorophenyl sulfone using a one-step high-temperature solution method. By adjusting the ratio of diphenol DDSQ to BPA, copolymers with variable DDSQ content in the main chains were obtained. With increased DDSQ content in the main chain, the glass transition temperature decreased based on differential scanning calorimetry, and anti-degradation was enhanced based on thermogravimetric analysis. Moreover, the dielectric constant of pure polymer (3.19 at 1 MHz) initially increased to 4.04 (DDSQ molar ratio=10%), and then decreased to 2.68 at 1 MHz (DDSQ molar ratio=100%). Crystallization behavior, solubility, and surface hydrophobicity were also investigated. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 780-788
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