Aging behavior of three-proof polyurethane coatings under UV radiation

Jianfa Wang; Zheng Gu; Jie  Zhao; Susu Zhang; Peiyao Li; Chao  Meng; Jinyong  Sui; Xiaoyi Zhang; Shaokai Hu; Jiaying Pan; Junyi Li

doi:10.14314/polimery.2022.9.4

Published : 2022-09-29

Vol. 67 No. 9 (2022)

Aging behavior of three-proof polyurethane coatings under UV radiation

Jianfa Wang https://orcid.org/0000-0002-1242-3794 Zheng Gu https://orcid.org/0000-0001-9521-2863 Jie Zhao Susu Zhang https://orcid.org/0000-0003-3620-0816 Peiyao Li https://orcid.org/0000-0002-4713-1599 Chao Meng https://orcid.org/0000-0001-6603-2273 Jinyong Sui https://orcid.org/0000-0002-4232-3540 Xiaoyi Zhang https://orcid.org/0000-0003-4047-5046 Shaokai Hu https://orcid.org/0000-0001-6603-2273 Jiaying Pan https://orcid.org/0000-0002-1609-7869 Junyi Li https://orcid.org/0000-0001-8110-6496

DOI: https://doi.org/10.14314/polimery.2022.9.4

Abstract

The influence of UV radiation on the physical and mechanical properties of polyurethane resins and three-proof polyurethane coatings was examined. Changes of mechanical properties and the gloss of resins and coatings were determined. The structure of materials was confirmed using scanning microscopy SEM and Fourier transform infrared spectroscopy FTIR; thermogravimetric TGA and DTG studies were also performed. It turned out that the gloss of finished protective coatings was worse than the gloss of individual resins, and aging significantly lowered these values (from 81.3° to 8.9° in case of resins and from 61.1° to 2.8° in case of coatings after 1200 hours of irradiation). Tensile strength of resins decreased constantly during aging while their elongation at break decreased than increased reaching minimum at exposure time of 100 hours. In case of coatings, both tensile strength and elongation at break firstly decreased than increased reaching minimum at exposure time of 800 hours; after long exposure time, more than 1200 hours, these properties decreased again.

Keywords

polyurethane ; ultraviolet ; coating ; resin poliuretan ; ultrafiolet ; powłoka ; żywica

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Wang, J., Gu, Z., Zhao, J. ., Zhang, S., Li, P., Meng, C. ., Sui, J. ., Zhang, X., Hu, S., Pan, J., & Li, J. (2022). Aging behavior of three-proof polyurethane coatings under UV radiation. Polimery, 67(9), 433-442. https://doi.org/10.14314/polimery.2022.9.4

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Jianfa Wang wjf19511638332@163.com
https://orcid.org/0000-0002-1242-3794

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Zheng Gu
https://orcid.org/0000-0001-9521-2863

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Jie Zhao

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Susu Zhang
https://orcid.org/0000-0003-3620-0816

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Peiyao Li
https://orcid.org/0000-0002-4713-1599

Affiliation
College of Materials Science and Engineering, Qingdao University, China 266071

Chao Meng
https://orcid.org/0000-0001-6603-2273

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Jinyong Sui
https://orcid.org/0000-0002-4232-3540

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Xiaoyi Zhang
https://orcid.org/0000-0003-4047-5046

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Shaokai Hu
https://orcid.org/0000-0001-6603-2273

Affiliation
College of Chemistry and Chemical Engineering, Qingdao University, China 266071

Jiaying Pan
https://orcid.org/0000-0002-1609-7869

Affiliation
College of Materials Science and Engineering, Qingdao University, China 266071

Junyi Li
https://orcid.org/0000-0001-8110-6496

Affiliation
College of Materials Science and Engineering, Qingdao University, China 266071