New monomer difurfurylamine easily obtainable from furfural (inexpensive biorenewable feedstock) was used for the synthesis of the polyurethane preform. The latest was cross‐linked with different amount of BMI (bismaleimide) via Diels–Alder reaction, and polymers with a high and low degree of cross‐linking were obtained and characterized. The self‐healing efficiency was investigated with differential scanning calorimetry, scanning electronic microscopy, X‐ray tomography, and tensile strength measurement end up to 95% restoration of mechanical properties was demonstrated for one composition after thermal treatment. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47869.

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Prepolymer synthesized from toluene-2,4-diisocyanate (TDI) (hard segment), and polypropylene glycol (PPG-2000) (soft segment) was end-capped with difurfurylamine groups. A new cross-linked self-healing polyurethane was obtained via Diels-Alder reaction of the en-capped prepolymer with N,N’-bismaleimido-4,4’-diphenylmethane (BMI). Thermal reversibility of the Diels-Alder reaction (DA-reaction) between terminal furanic rings of the polyurethane prepolymer and bismaleimide cross-linking agent designed to be responsible for self-healing. Polymers were characterized by NMR and IR spectroscopy and thermal analysis (DSC and TGA). Thermal reversibility of the DA-bonds in the cross-linked polymer was confirmed by DSC. The synthesized polymer has good processability and potential recyclability.

The paper presents experimental study of IR absorbance of the thin TiO film (with the thickness of 600 nm) on the glass substrate. The titanium monoxide (TiO) film was prepared with the ion-beam scattering. The film was characterized by XRD, FTIR, SEM etc. IR absorption spectra for the film and the substrate were measured. It was shown that the average absorbance Ā of the pure glass substrate is Ā ≈ 0.08 in the wavelength range λ = 2.5 … 15 μm. For the TiO film it was obtained that Ā ≈ 0.38 in the same λ range.