2026 (2) 1
https://doi.org/10.15407/polymerj.48.02.051
COMPATIBILITY STUDIES BETWEEN ELASTOMERIC POLYESTERURETHANES AND VINYL CHLORIDE/VINYL ACETATE COPOLYMERS
Tetiana MALYSHEVA* (ORCID: 0000-0002-3046-6819)
Oleksandr TOLSTOV (ORCID: 0000-0001-6016-9308)
Institute of Macromolecular Chemistry of the NAS of Ukraine,
48 Kharkivske Highway, 02155 Kyiv, Ukraine
*Corresponding author.
E-mail: malysheva_tat@ukr.net
Polimernyi Zhurnal, 2026, 48, no. 2: 51-59
Section: Structure and properties
Language: Ukrainian.
Received 27.04.2026
Accepted 18.05.2026
Published 24.06.2026
Abstract
The influence of the chemical structure of semicrystalline polyesterurethane elastomers (PU) and vinyl chloride-vinyl acetate copolymers of grades A-15 (KPLA-15), A-25, and A-15-0 on the physical interfacial interaction network, supramolecular structure, thermophysical properties, and cohesive-adhesive properties of polymer-polymer blends was investigated. FTIR spectroscopy analysis has shown that in mixtures of PU synthesized from oligo(butylene glycol adipate) with Mw = 2000, strong interfacial hydrogen bonds (HBs) form, initiating the formation of a transition layer with disordered macromolecular packing and significantly impairing the cohesive-adhesive properties of the composites. Reinforcing the intramolecular HBs network in the PU elastomer by introducing polar rigid segments or replacing a flexible segment with a less compatible oligoester, such as oligo(ethylene glycol/butylene glycol adipate) (PEBA), leads to a restriction of macromolecule diffusion at the interphase region and promotes the formation of a transition layer, thereby significantly improving the cohesive-adhesive properties of polymer-polymer blends. The composite prepared from PEBA-based PU and 30 % of KPLA-15 exhibits a nanoheterogeneous structure and superior adhesive properties compared to neat PU. Increasing the oxygen-reached vinyl acetate fragments content in the copolymer macrochains from 15 to 25 % or introducing 2–3 % of OH groups leads to a strengthening of intramolecular HBs, deteriorates interfacial adhesion, and reduces composite strength.
Keywords: polymer blends, polyesterurethane elastomers, polymers of vinyl chloride, interface interactions, strength, adhesion.
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