Observation of the Effect of Aging on the Structural Changes of Polyurethane/Polyurea Coatings

Paulina Mayer-Trzaskowska; Mariola Robakowska; Łukasz Gierz; Joanna Pach; Ewa Mazur

doi:10.3390/polym16010023

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Title

Observation of the Effect of Aging on the Structural Changes of Polyurethane/Polyurea Coatings

Authors

Paulina Mayer-Trzaskowska
Mariola Robakowska (WTCH) ^{[ 1 ][ 7.6 ][ P ]}
Łukasz Gierz (WIM) ^{[ 2 ][ 2.9 ][ P ]}
Joanna Pach
Ewa Mazur

^{[ 1 ]} Instytut Technologii i Inżynierii Chemicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | ^{[ 2 ]} Instytut Konstrukcji Maszyn, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | ^{[ P ]} employee

Scientific discipline (Law 2.0)

[2.9] Mechanical engineering
[7.6] Chemical sciences

Year of publication

2024

Published in

Polymers

Journal year: 2024 | Journal volume: vol. 16 | Journal number: iss. 1

Article type

scientific article

Publication language

english

Keywords

EN

aging
adhesion
pull-off test
atmospheric aging
polyurea/polyurethane coatings
surface wettability
thermal properties

Abstract

EN In this study, polyurethane/polyurea coatings were exposed to four different types of aging: aging in the natural environment (NC), accelerated ultraviolet aging (UV), aging in a sodium chloride solution (NaCl), and thermal aging (TC). To monitor the changes that occurred during these processes, the thickness was measured and microscopic and macroscopic observations were conducted continuously. The samples aged under various conditions were then subjected to spectroscopic (FTIR) and thermal (TGA) analysis to determine the possible structural changes in the coatings. The dependence of aging conditions on the physicochemical properties of the tested coating surfaces was thoroughly investigated and characterized by the water contact angle and surface free energy. Adhesion tests were performed after the established aging period. The results show that different aging conditions have a tremendous effect on the appearance and pull-off strength. The coatings that age in a NaCl solution are more affected in terms of their adhesion.

Date of online publication

20.12.2023

Pages (from - to)

23-1 - 23-17

DOI

10.3390/polym16010023

URL

https://www.mdpi.com/2073-4360/16/1/23

Comments

Article number: 23

License type

CC BY (attribution alone)