Effect of the Molecular Weight of Polyarylene Ether Ketones on the Tribological Properties
| Autor: | A. A. Askadsky, M. V. Goroshkov, Inesa V. Blagodatskikh, Alexander V. Naumkin, Vera V. Shaposhnikova, Sergey N. Salazkin, Krasnov Aleksandr P |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Bisphenol A Materials science Ether 02 engineering and technology Polymer Tribology 010402 general chemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Amorphous solid chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering X-ray photoelectron spectroscopy chemistry Chemical engineering Mechanics of Materials Propane Surface layer |
| Zdroj: | Journal of Friction and Wear. 39:114-120 |
| ISSN: | 1934-9386 1068-3666 |
| Popis: | The effect of the molecular weights of amorphous polyarylene ether ketone (PAEK) synthesized by the reaction of 4,4'-difluorobenzophenone with 2,2-bis (4'-hydroxyphenyl) propane (bisphenol A) potassium diphenolate on its tribological characteristics has been studied. In the case of the friction of a sample with M w < 200 × 103 Da, its high wear resistance and the coefficient of friction decreased to 0.4, even at high pressures of up to 10 MPa. These properties of high-molecular-weight PAEK are due to the high contribution of the weak dispersion forces into the intermolecular interaction energy of the polymer. Low wear determines the nature of tribodestruction, which, during the process of self-organization, leads to the appearance of a positive gradient in the physicomechanical properties in the surface layers. The XPS study shows that, during PAEK pressing at 260°C, the intensive oxidation of a thin surface layer occurs. |
| Databáze: | OpenAIRE |
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