Formation of the Percolation Network by Carbon Black Particles in Blends of Incompatible Polymers under the Conditions of Shear Strain of the Melt

• Published in: Russian journal of applied chemistry Vol. 94; no. 7; pp. 954 - 958
• Main Authors: Zaikin, A. E., Akhmetov, A. R.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.07.2021; Springer Nature B.V
• Subjects: Addition polymerization; Brownian motion; Carbon; Carbon black; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Conducting polymers; Electrical resistivity; Industrial Chemistry/Chemical Engineering; Macromolecular Compounds and Polymeric Materials; Melts; Percolation; Polydimethylsiloxane; Polyethylene; Polyethylenes; Polymer blends; Polymer melts; Polystyrene resins; Shear strain; carbon black; polymer blend; percolation; conducting composite
• ISSN: 1070-4272; 1608-3296
• DOI: 10.1134/S1070427221070132

The relationships of the formation of a three-dimensional conducting network from carbon black particles in melts of polyethylene, polystyrene, and polyethylene–polydimethylsiloxane and polyethylene–polystyrene blends after the action of shear strain were studied. Such network in the polymer blends is formed faster and in a shorter time than in the individual polymer melts. This is caused by the fact that the major fraction of carbon black is concentrated in one of the polymeric components and at the polymer interface. In addition, it is highly likely that rapid formation of the network of filler particles in polymer blends is favored by higher rate of directional motion of carbon black particles to the polymer interface, compared to disordered Brownian motion of these particles in the bulk. The relationships obtained create prerequisites for the development of conducting polymer materials whose electrical conductivity is less sensitive to processing conditions.