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Evaluation of the influence of the nature of the substrate on the morphology and properties of modified copolyurethaneimide films by atomic force microscopy

https://doi.org/10.29235/1561-8358-2025-70-3-241-251

Abstract

The effect of the substrate nature on the structure and properties of copolyurethaneimide (coPUI) films has been studied using atomic force microscopy (AFM), nanoindentation, and strain-strength testing. It was found that the morphology of the surface of the films of coPUI (R-2300TDI-R)(SODp) is more homogeneous than coPUI (R-AltTDI-R)(SODp). The films are characterized by extremely low rigidity (elastic modulus – 3.6–3.7 MPa, strength – below 4 MPa). Using the nanoindentation method, it was found that the first coPUI has two phases simultaneously – one conventionally called “amorphous” (E = 30–40 MPa), and the second conventionally called “partially ordered” (E = 10–25 GPa). Microhardness for the coPUI (R-2300TDI-R)SODp is in the range from 2 to 4 MPa. Using AFM it was determined that the highest value of the adhesion force and, accordingly, the specific surface energy is observed in coPUI (R-2300TDI-R)(SODp). Mechanical tests were carried out and the deformation curves of the coPUI films deposited on different substrates were obtained. It is shown that the morphology and degree of surface roughness of films that were in contact with the substrate during the preparation process significantly depend on the nature of the substrate. The synthesized materials can be used in creation of antifriction coatings, membranes for the first-generation separation of aromatic hydrocarbons from liquid mixtures of aliphatic and aromatic hydrocarbons, which is important for petrochemical technology; as membranes for separating nitrogen/carbon dioxide gas mixtures in order to capture carbon dioxide from flue gases of thermal power plants; structural thermoplastics such as polyurethanes for 3D printing, as well as substrates with controlled adhesion to hold microobjects.

About the Authors

T. E. Sukhanova
Branch of Petersburg Nuclear Physics Institute named by B. P. Konstantinov of the National Research Centre “Kurchatov Institute” – Institute of Macromolecular Compounds
Russian Federation

Tatiana E. Sukhanova – Dr. Sci. (Physics and Mathematics), Leading Researcher of the Laboratory for the synthesis of heat-resistant polymers

31, Bolshoj prospect of Vasilievsky island, 199004, Saint-Petersburg



M. E. Vylegzhanina
Branch of Petersburg Nuclear Physics Institute named by B. P. Konstantinov of the National Research Centre “Kurchatov Institute” – Institute of Macromolecular Compounds
Russian Federation

Milana E. Vylegzhanina – Researcher of the Laboratory of polymer morphology at Branch of Petersburg Nuclear Physics

31, Bolshoj prospect of Vasilievsky island, 199004, Saint-Petersburg



V. A. Lapitskaya
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus

Vasilina A. Lapitskaya – Cand. Sci. (Engineering), Associate Professor, Deputy Head of the Laboratory of Nanoprocesses and Technologies 

15, P. Brovka St., 220072, Minsk



T. A. Kuznetsova
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus

15, P. Brovka St., 220072, Minsk



V. M. Svetlichny
Branch of Petersburg Nuclear Physics Institute named by B. P. Konstantinov of the National Research Centre “Kurchatov Institute” – Institute of Macromolecular Compounds
Russian Federation

Valentin M. Svetlichny – Dr. Sci. (Chemistry), Chief Researcher, Head of the Laboratory for the synthesis of heat-resistant polymers

31, Bolshoj prospect of Vasilievsky island, 199004, Saint-Petersburg



I. V. Gofman
Branch of Petersburg Nuclear Physics Institute named by B. P. Konstantinov of the National Research Centre “Kurchatov Institute” – Institute of Macromolecular Compounds
Russian Federation

Iosif V. Gofman – Cand. Sci. (Chemistry), Leading Researcher of the Laboratory for large–scale experimental research and modeling of polymer composites based on promising thermoplastics for industrial applications

31, Bolshoj prospect of Vasilievsky island, 199004, Saint-Petersburg



A. L. Didenko
Branch of Petersburg Nuclear Physics Institute named by B. P. Konstantinov of the National Research Centre “Kurchatov Institute” – Institute of Macromolecular Compounds
Russian Federation

Andrey L. Didenko – Cand. Sci. (Chemistry), Senior Researcher of the Laboratory for the synthesis of heat-resistant polymers

31, Bolshoj prospect of Vasilievsky island, 199004, Saint-Petersburg



V. V. Kudryavtsev
Branch of Petersburg Nuclear Physics Institute named by B. P. Konstantinov of the National Research Centre “Kurchatov Institute” – Institute of Macromolecular Compounds
Russian Federation

Vladislav V. Kudryavtsev – Dr. Sci. (Chemistry), Professor, Chief Researcher of the Laboratory of Synthesis of heat-resistant polymers

31, Bolshoj prospect of Vasilievsky island, 199004, Saint-Petersburg



R. E. Trukhan
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus

Ruslan E. Trukhan – Junior Researcher of the Laboratory of nanoprocesses and technologies

15, P. Brovka St., 220072, Minsk



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ISSN 1561-8358 (Print)
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