A high-performance renewable thermosetting resin derived from eugenol.

Autor: Harvey BG; Research Department, Materials Chemistry Branch, US Navy, Naval Air Warfare Center, Weapons Division (NAWCWD), 1900 N. Knox Rd. Stop 6303, China Lake, CA 93555 (USA). benjamin.g.harvey@navy.mil., Sahagun CM, Guenthner AJ, Groshens TJ, Cambrea LR, Reams JT, Mabry JM
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2014 Jul; Vol. 7 (7), pp. 1964-9. Date of Electronic Publication: 2014 Apr 29.
DOI: 10.1002/cssc.201400019
Abstrakt: A renewable bisphenol, 4,4'-(butane-1,4-diyl)bis(2-methoxyphenol), was synthesized on a preparative scale by a solvent-free, Ru-catalyzed olefin metathesis coupling reaction of eugenol followed by hydrogenation. After purification, the bisphenol was converted to a new bis(cyanate) ester by standard techniques. The bisphenol and cyanate ester were characterized rigorously by NMR spectroscopy and single-crystal X-ray diffraction studies. After complete cure, the cyanate ester exhibited thermal stability in excess of 350 °C and a glass transition temperature (Tg ) of 186 °C. As a result of the four-carbon chain between the aromatic rings, the thermoset displayed a water uptake of only 1.8% after a four day immersion in 85 °C water. The wet Tg of the material (167 °C) was only 19 °C lower than the dry Tg , and the material showed no significant degradation as a result of the water treatment. These results suggest that this resin is well suited for maritime environments and provide further evidence that full-performance resins can be generated from sustainable feedstocks.
(© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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