Rheology of dispersions of plasma-processed fine alumina in epoxy resin

• Autorzy: Jakobsons E. , Palcevskis E.
• Konferencja: Third International Conference on Engineering Rheology, ICER 2005
• Języki publikacji: EN

Abstrakty

EN

The rheological properties (flow curves and the viscoelastic behavior) of the dispersions prepared from plas-ma-processed Al2O3 powders and epoxy wax were investigated on wide ranges of shear rates (from 0.018 to 1350s-1) and frequencies (from 0.063 to 157s-1). Oleic acid and Hypermer LP1 was chosen as dispersants for preparation of the dispersions. It is stated that, at the concentration f ? 15 vol. %, for the composites studied, a spatial particle-particle network structure arise, which is broken at a critical stress s0. The slippage of the sample against the surface of rheometer tools was tested by mutual collation of test records obtained with the cone-plate and cylinder-cylinder equipments. The results showed that the influence of dispersants is the most pronounced if the composite has a spatial particle-particle structure.

Słowa kluczowe

EN

epoxy resin; alumina; oleic acid nitride; Hypermer LP1; flow curves; viscoelasticity

PL

żywica epoksydowa; glinka; kwas oleinowy; lepkosprężystość

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2005
• Tom: Vol. 10, no spec
• Strony: 225--232
• Opis fizyczny: Bibliogr. 20 poz., tab., wykr.

Twórcy

autor

Jakobsons E.

• Institute of Polymer Mechanics, 23 Aizkraukles Str., LV-1006, Riga, LATVIA

autor

Palcevskis E.

• Institute of Inorganic Chemistry, Technical University of Riga, 34 Miera Str., Salaspils-1, LV-2169, LATVIA

Bibliografia

• [1] German R.M. and Bose A.(1997): Injection Molding of Metals and Ceramics. - Princeton: Metal Powder I Federation.
• [2] Jakobsons E., Faitelson L., and Palcevskis E. (2003): Rheology of concentrated suspensions of plasma-processed fine alumina. - Int. J. of Applied Mechanics and Engineering, vol.8, pp.251-258 (Suppl.)
• [3] Joshi P.G. and Leonov A.I. (2001): Modeling of steady and time-dependent responses in filled, uncured, and crosslinked rubbers. - Rheol. Acta, vol.40, pp.350-365.
• [4] Katz H.S. and Milewski D.V. (1978): Handbook of fillers and reiforcments for plastics. - New York: Van N Reinhold Comp.
• [5] Khan S. A. and Zoellera N.J. (1993): Dynamic rheological behavior of flocculated fumed silica suspensions - J, K vol.37, pp. 1225-1235.
• [6] Kim D.-J., Lee M.-H., Lee D.-Y., and Han J.-S. (2000): A comparison of mechanical properties of all-ceramic alumina dental crowns prepared from aqueous- and non-aqueous-based tape casting. - Biomed Mater Res., V pp.314-319.
• [7] Larson G.L. (1999): The Structure and Rheology of Complex Fluids. - Oxford: University Press, Oxford.
• [8] Li J.Q. and Salovey R. (2004): Model filled polymers: The effect of particle size on the rheology of filled poly (methyl methacrylate) composites. - Pol. Eng. Sci., vol.44, pp.452-462.
• [9] Macosko C.W. (1989): RIM Fundamentals of Reaction Injection Molding. - New York: Hanser Publishers.
• [10] Maity A. and Biswas M. (2003): A nanocomposite of poly (N-vinylcarbazole) with nanodimensional alumina. – J. Pol. Sci., vol.88, pp.2233-2237.
• [11] Middleman S. (1968): The Flow of High Polymers. - N. Y.: John Wiley & Sons.
• [12] Osman M.A, Atallah A., Schweizer T. and Ottinger H.C. (2004): Particle-particle and particle-matrix interaction calcite filled high-density polyethylene-steady shear. - J. Rheol., vol.48, pp. 1167-1184.
• [13] Palcevskis E. Faitelson L., and Jakobsons E. (2005): Rheological properties of the alumina nanocomposite wax stock. - Mechanics of Composite Materials, vol.41, No.3.
• [14] Park J.H. and Jana S.C. (2003): Mechanism of exfoliation of nanclay particles in epoxy-clay nano composites Macromolecules, vol.36, pp.2758-2768.
• [15] Persello J., Magnin A., Chang J., Piau J.M. and Cabane B. (1994): Flow of colloidal aqueous silica dispersion. - J. Rheol., vol.38, pp. 1845-1870.
• [16] Rueb C.J. and Zukoski C.F. (1997): Viscoelastic properties of colloidal gels. - J. Rheol., vol.41, pp.197-218.
• [17] Schuh H.E. and May R. (1996): Strategy to develop and evaluate a new bounding-system. - ADM-Transactions, vol. pp.275-281.
• [18] Song J.H. and Evans J.R.G. (1996): Ultrafine ceramic powder injection moulding: The role of dispersants. - J. Rheol vol.40, pp. 131-152.
• [19] Sterenstein S.S. and Ai-Jun Zhu (2002): Reinforcement mechanism of nanofilled polymer melts as elucidated by n linear viscoelastic behavior. - Macromolecules, vol.35, pp.7262-7273.
• [20] Wang Y. and Wang J.J. (1999): Shear yield behavior of calcium carbonate-filled polypropylene. - Polym. Eng. Sul vol.39, pp.190-198.