Abstract
The viscoelastic properties of a dispersion of polyacrylonitrile particles stabilised by a block copolymer poly-2-vinylpyridine/polytert butylstyrene dispersed in solvesso have been measured as a function of particle concentration and frequency at ambient temperatures. At low volume fraction of particles it was found that the loss modulus of the dispersions was larger than the storage modulus, whilst at volume fractions > 0.40 the storage modulus dominates the rheology. This is attributable to there being a steric repulsion between the particles as a result of an increasing concentration of particles and the resultant reduction in interparticle separation in the dispersion. In addition the observed exponential increase of the storage modulus with increasing particle volume fraction mirrors the exponential increase in force with decreasing surface separation of the same type of polymers adsorbed to mica.
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References
Tadros ThF (1984) Amer Chem Soc Symposium Series 246:411
Prestidge C, Tadros ThF, J Colloid Interface Sci, in press
Milkie T, Lok K, Croucher MD (1982) Colloid Polym Sci 260:531
Strivens TA (1983) Colloid Polym Sci 261:74
Strivens TA (1987) Colloid Polym Sci 265:53
Klein J (1983) J Chem Soc Faraday Trans I 79:99
Klein J, Luckham PF (1984) Macromolecules 17:1041
Luckham PF, Klein J (1985) Macromolecules 18:721
Hadziiannou G, Patel S, Grannick S, Tirrel M (1986) JACS 108:2869
Taunton HJ, Toprakcioglu C, Fetters LJ, Klein J (1988) Nature 332:712
Luckham PF, Ansarifar MA (1987) Chemical Engineering Science 42:799
Ansarifar MA, Luckham PF (1988) Polymer 29:329
Ansarifar MA, Luckham PF (1988) Polymer Communications 29:177
Ansarifar MA, Luckham PF (1988) Colloid Polym Sci 266:1020
De Silva GPHL, Luckham PF, Tadros ThF (1989) Polymer Communications 30:220
Barrett KEJ (1975) Dispersion Polymerisation in Organic Media. Wiley, New York
Buscall R, Goodwin JW, Hawkins MW, Ottewill RH (1982) J Chem Soc Faraday Trans I 78:2889
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Ansarifar, M.A., Luckham, P.F. Viscoelastic properties of polyacrylonitrile particles stabilised by a poly-2-vinylpyridine/polytert butylstyrene block copolymer. Colloid & Polymer Sci 267, 736–740 (1989). https://doi.org/10.1007/BF01524377
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DOI: https://doi.org/10.1007/BF01524377