2026 (1) 3
https://doi.org/10.15407/polymerj.48.01.022
BRANCHED POLYURETHANES BASED ON RENEWABLE RAW MATERIALS: STRUCTURE AND PROPERTIES
Liudmyla MARKOVSKA* (ORCID: 0000-0003-3427-9786)
Nataliia PARKHOMENKO (ORCID: 0000-0001-7481-9113)
Olga SAVELYEVA (ORCID: 0000-0002-3167-8493)
Yuri SAVELYEV (ORCID: 0000-0003-3356-9087)
Institute of Macromolecular Chemistry, NAS of Ukraine
48, Kharkivske Highway, Kyiv, 02155, Ukraine
*Corresponding author.
E-mail: yuri2savelyev@gmail.com
Polimernyi Zhurnal, 2026, 48, no. 1: 22-29
Section: Structure and properties
Language: Ukrainian.
Abstract
Polymer compositions based on branched polyurethanes (BPU) have been developed using renewable natural raw materials, particularly castor oil (CO), while maintaining the performance characteristics inherent in polyurethanes. The developed method for obtaining these materials will improve the process’s cost-effectiveness and environmental friendliness. The introduction of CO, as a macrochain fragment, into the structure of the BPU at 25 to 64 wt.% increases the adhesive/cohesion strength of the BPU/CO; it also contributes to the preservation of the indicators of physical, mechanical and operational properties of BPU/CO under conditions of complex cumulative atmospheric loading (UV and IR radiation, prolonged elevated temperature and humidity); changes the nature of thermal-oxidative destruction, contributes to the preservation of indicators of physical, mechanical, and operational properties of BPU/CO under conditions of complex cumulative atmospheric loading (UV and IR radiation, prolonged elevated temperature and humidity); changes the nature of thermal-oxidative destruction, indicating the stabilizing effect of CO on resistance to this destructive action; gives BPU/CO signs of resistance to fungus, water, oil, gasoline, diesel fuel, organic solvents, and diluted acids and alkalis. Targeted materials with improved properties can be obtained by varying the structure and composition of the BPU/CO. The developed materials can be used as protective coatings for various objects, provided they are adapted to the available raw material base. The ability of the BPU/CO to provide long-term, comprehensive protection for materials, structures, and infrastructure will ensure their reliable, prolonged operation.
Keywords: branched polyurethanes, renewable raw materials, adhesion, a(biotic) destructors, barrier properties.
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