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Authors = Anton Yu. Beliaev

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11 pages, 14155 KiB  
Article
The Fracture of Plasma-Treated Polyurethane Surface under Fatigue Loading
by Ilya A. Morozov, Alexander S. Mamaev, Mikhail V. Bannikov, Anton Yu. Beliaev and Irina V. Osorgina
Coatings 2018, 8(2), 75; https://doi.org/10.3390/coatings8020075 - 14 Feb 2018
Cited by 21 | Viewed by 4316
Abstract
Plasma treatment of soft polymers is a promising technique to improve biomedical properties of the materials. The response to the deformation of such materials is not yet clear. Soft elastic polyurethane treated with plasma immersion ion implantation is subjected to fatigue uniaxial loading. [...] Read more.
Plasma treatment of soft polymers is a promising technique to improve biomedical properties of the materials. The response to the deformation of such materials is not yet clear. Soft elastic polyurethane treated with plasma immersion ion implantation is subjected to fatigue uniaxial loading. The influence of the strain amplitude and the plasma treatment regime on damage character is discussed. Surface defects are studied in unloaded and stretched states of the material. As a result of fatigue loading, transverse cracks (with closed overlapping edges as well as with open edges deeply propagating into the polymer) and longitudinal folds which are break and bend inward, appear on the surface. Hard edges of cracks cut the soft polymer which is squeezed from the bulk to the surface. The observed damages are related to the high stiffness of the modified surface and its transition to the polymer substrate. Full article
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