Accession Number : AD0892850

Title :   Hydrocarbon Gel Properties.

Descriptive Note : Technical publication, Jan-Nov 71,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s) : Adicoff, Arnold ; Woodman, Alan L. ; Murbach, Warren J.

Report Date : MAR 1972

Pagination or Media Count : 24

Abstract : The rheology of an aluminum diisooctanoate (M4)-xylene gel was investigated over the temperature range of 0 to 50C, a frequency range of 0.002 to 1 Hz and at a displacement of 0.1 cm with an NWC-designed forced vibration rheometer using flat plates. The gel showed linear viscoelastic behavior over the range of measurement used here. The loss modulus exhibited an absorption peak in the region of 0.03 Hz at 50C which shifted towards lower frequencies with decreasing temperatures; it is attributed to motion of the aliphatic soap side chain. The energies of activation derived from the moduli are ascribed to side chain and main chain motions. A modification of Gray's postulated structure for the aluminum soap gel is proposed in which the aluminum-oxygen polymer backbone forms a helix which is stabilized by hydrogen bonding between the hydroxyl group and the carboxylic acid moiety. (Author)

Descriptors :   *RHEOLOGY), (*GELS, (*MOLECULAR STRUCTURE, GELS), VISCOELASTICITY, OCTANOIC ACID, ALUMINUM COMPOUNDS, XYLENES, ULTRASONIC PROPERTIES, JET ENGINE FUELS, VISCOSITY, ALUMINUM SOAPS.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE