Abstract
Abstract A significant disadvantage of parts made of linear block polyurethanes under conditions of friction contact in the presence of an aqueous medium is the intensification of hydrolysis processes and decrease in volume strength. It was proposed to slow down the hydrolysis of polyurethanes in three ways: by directed changes in chemical structure, by electromagnetic radiation of different intensities and by creation of composite materials, based on the principle of additional intermolecular crosslinking at the manufacturing and hot processing stages. The conditions for the formation of a smooth wear-resistant surface that protects the material from rapid destruction are revealed.
Highlights
Polyurethanes are among the most universal and practically used polymers, due to the wide possibilities of changing their chemical structure and properties [1]. They are processed by high-performance injection molding, extrusion, blowing, pneumatic molding, pressing, etc
All known types of materials and products can be obtained from polyurethanes: filled, reinforced, foamed, laminated and others in the form of plates, sheets, blocks, profiles, fibers, films, etc
Polyblock polyurethanes of linear structure are widely used in industry because of their unique combination of properties: high level of strength and elasticity, oil and gas resistance, resistance to shock loads and vibration
Summary
Polyurethanes are among the most universal and practically used polymers, due to the wide possibilities of changing their chemical structure and properties [1]. They are processed by high-performance injection molding, extrusion, blowing, pneumatic molding, pressing, etc. Polyblock polyurethanes of linear structure are widely used in industry because of their unique combination of properties: high level of strength and elasticity, oil and gas resistance, resistance to shock loads and vibration. Products and constructions based on linear block-polyurethanes (BPU) are used in all industries without exception. Previous studies have shown that the magnitude of wear rate of the oligesters-based BPU when adding water to the contact zone increases more than an order of magnitude [3]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
