NEW METAL-CONTAINING POLY(URETHANE-SEMICARBAZIDES) ON THE BASIS OF PYRIDINE DERIVATIVES
Published: 23 November 2019
Technology transfer: fundamental principles and innovative technical solutions , Volume 3, pp 64-66; doi:10.21303/2585-6847.2019.001036
Abstract: The growth of science and technology of polyurethanes leads to the development of new materials with more desirable properties. Modiﬁcation of polyurethane (PU) by incorporating metal and functional groups are used extensively to improve various properties, such as enhanced thermal stability, ﬁre retardancy, ﬂexibility and solubility. In this investigation, a new metal-containing poly(urethane-semicarbazides) bearing a pyridine moiety have been synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), differential thermal analysis (DTA/TG) and tensile strength measurements. The results showed that the incorporation of metal ions into the polymer chain greatly inﬂuenced their mechanical and thermal properties. The tensile strength measurements on the PU ﬁlms showed a marked difference in the elongation and tensile strength for compositions with various metal salts. The nature of the anion of the salt also affects the properties of the polymers, since the anions are able to form complexes with hydrogen atoms of urethane-semicarbazide PU segments. According to the results of DTA, introduction of metal ions leads to the increase of the thermal stability of metal-containing PU, as compared to the original PU. FTIR spectra data confirmed that the metal ions Cu2+, Co2+ are coordinated in the polymer metal chelates with hydrazide and urethane groups. The research results can be used to develop the new materials and methods for the preparation and designing of metal-containing polymers required in various areas, such as development of medical equipment, functional films and other related areas.
Keywords: salt / functional / Differential / Tensile / urethane / Semicarbazides / metal containing
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