Abstract
The dispersion of polyisobutylene was studied on a Thar RESS-100-2 test bench over the temperature and pressure ranges 45–120°C and 100–350 bar; 30–1000 nm particles were obtained. Particle size could be controlled by varying process parameters. A procedure for modifying polymer particles during rapid expansion of supercritical solutions was suggested. Modification suppressed agglomeration and caused particle coating with a modifier (NaCl). The use of supercritical fluid antisolvents was shown to be promising for the dispersion of polymers to nanosized particles. An experimental bench for performing such processes was described. A procedure for trapping nanoparticles prepared using antisolvents was suggested. Particles with sizes of 10 to 150 nm were obtained in the dispersion of polystyrene in the toluene-polystyrene-supercritical carbon dioxide system at 40–150 bar and temperatures of 40 and 100°C.
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Original Russian Text © I.M. Gil’mutdinov, V.F. Khairutdinov, I.V. Kuznetsova, A.A. Mukhamadiev, F.R. Gabitov, F.M. Gumerov, A.N. Sabirzyanov, 2009, published in Sverkhkriticheskie Flyuidy: Teoriya i Praktika, 2009, Vol. 4, No. 3, pp. 25–38.
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Gil’mutdinov, I.M., Khairutdinov, V.F., Kuznetsova, I.V. et al. The dispersion of polymeric materials with the use of supercritical fluids. Russ. J. Phys. Chem. B 3, 1145–1153 (2009). https://doi.org/10.1134/S1990793109080041
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DOI: https://doi.org/10.1134/S1990793109080041