Carbon black (CB) particles were employed as a reinforcing filler in carboxyl-terminated butadiene acrylonitrile rubber (CTBN)/epoxy resin (diglycidyl ether of bisphenol-A (DGEBA))/aromatic diamine (diamino diphenyl methane (DDM)) network polymer blends. The strength, modulus, and ability to absorb impact energy of the resulting composites were evaluated. The aim of this work was to determine the effects of interfacial interactions between components, and processing conditions (especially temperature) on mechanical properties. The application of high temperatures during the kneading process resulted in strong interfacial interactions between the CB particles and the CTBN. The formation of strong bonds at the CB/CTBN interfaces during kneading was the key factor in obtaining high strength and high impact energy absorbance. The composites also exhibited good adhesive strength during both shear and peel stress tests.

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The reaction of the dianion of phenylsulfinylacetone with alkyl halides afforded beta-keto sulfoxides, which were first chlorinated with hexachloroethane and then treated successively with KH and t-BuLi to give carboxylic acids in three-steps in moderate overall yields from the alkyl halides. This procedure affords a good method for a synthesis of carboxylic acids from alkyl halides with three-carbon elongation.

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Carboxylic acidsCarboxylic acids P 0250 Dianion of Sulfinylacetone as a Synthetic Equivalent of β-Enolate of Propionic Acid: A Novel Synthesis of Carboxylic Acids from Alkyl Halides with Three--Carbon Elongation. -The title compounds (V) are obtained by a new method in good yields. -(SATOH*, T.; IMAI, K.; Chem. Pharm. Bull. 51 (2003) 5, 602-604; Dep. Chem., Fac. Sci., Sci. Univ. Tokyo, Shinjuku, Tokyo 162, Japan; Eng.) -C. Oppel 42-070