Abstract
The supramolecular structure and tribological properties of filled polytetrafluoroethylene composites irradiated above the melting point of the crystalline phase of the polymer component and the phase transitions in them are investigated. In unirradiated composites, phase separation is observed, that is, the separation of the filler from the polymer matrix. The supramolecular structure of the polymer component does not depend on the nature and concentration of the filler, and it is characterized by the formation of lamellae during sintering and subsequent crystallization. Radiation exposure leads to the disappearance of the phase separation and the formation of axiolites with the radial orientation of fibrils, in the center of which the filler particles are located. Changes in the structure are explained by an increase in interfacial interactions through the radiation grafting of macromolecules (and low-molecular-weight products) to the surface of the filler particles. The linear wear rate of irradiated composites is 50 times lower relative to the unirradiated samples because of the transition from the delamination to abrasive wear mechanism.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
N. P. Istomin and A. P. Semenov, Antifriction Properties of Composite Materials Based on Fluoropolymers (Nauka, Moscow, 1984) [in Russian].
B. A. Loginov, A. L. Villemson, and V. M. Buznik, Russian Fluoropolymers: History, Technology, and Prospects (Moscow, 2013) [in Russian].
V. A. Kargin, G. L. Slonimskii, and T. I. Sogolova, in Polymer Science Problems: Selected Papers (Nauka, Moscow, 1986) [in Russian].
G. H. Michler and F. J. Balta-Calleja, Mechanical Properties of Polymers Based on Nanostructure and Morphology (Taylor&Francis, London, 2005).
A. A. Okhlopkova, P. N. Petrova, S. N. Popov, and S. A. Sleptsova, Ross. Khim. Zh. 52 (3), 147 (2008).
M. Conte and A. Igartua, Wear 296, 568 (2012).
S. A. Khatipov and N. A. Artamonov, Ross. Khim. Zh. 52 (3), 89 (2008).
A. V. Petrovskaya and S. A. Khatipov, Materialovedenie, No. 4, 49 (2011).
S. A. Khatipov, S. A. Serov, N. V. Sadovskaya, and E. M. Konova, Radiat. Phys. Chem. 81 (3), 256 (2012).
E. M. Konova, Candidate’s Dissertation in Chemistry (Karpov Res. Phys.-Chem. Inst., Moscow, 2014).
S. A. Khatipov, S. A. Serov, N. V. Sadovskaya, and E. M. Konova, Polymer Sci., Ser. 54 (9), 684 (2012).
T. A. Blanchet and F. E. Kennedy, Wear 14, 229 (1992).
K. Tanaka and S. Kawakami, Wear 79, 221 (1982).
S. A. Khatipov, S. A. Serov, and N. V. Sadovskaya, Vopr. Materialoved. 72 (4), 191 (2012).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.V. Sadovskaya, A.Yu. Obvintsev, R.S. Khatipov, D.I. Seliverstov, S.A. Khatipov, 2016, published in Poverkhnost’, 2016, No. 9, pp. 38–45.
Rights and permissions
About this article
Cite this article
Sadovskaya, N.V., Obvintsev, A.Y., Khatipov, R.S. et al. Effect of irradiation on interfacial interaction and structure formation in filled PTFE composites. J. Surf. Investig. 10, 917–924 (2016). https://doi.org/10.1134/S1027451016050128
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1027451016050128