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- W2038000948 abstract "For the purpose of developing of polymer nanocomposites based on polar polymers - polyurethane and related polymers, a method of modifying the montmorillonite (MMT) with a new modifier containing urethane groups in it structure has been first elaborated. Exchange capacity of the MMT surface was determined by adsorption of methylene blue; the structure of the modifier was confirmed by X-ray analysis, the content of the organic component in the modified MMT was measured by thermogravimetric analysis. The molecular weight and molecular weight distribution of the modifier was determined by size exclusion chromatography. The resulting modified MMT has been designed to form nanostructured composites on the basis of polymers having polar groups in their composition, including polyurethanes, with the aim to increase the physical and mechanical properties of based film materials. The new modifier – oligourethane ammonium chloride provides high affinity of MMT with the polymer matrix due to the possibility of hydrogen bonds formation. The intercalation of modifier into MMT interlayer space (increasing the distance between the layers after modification by 0.68 nm), as well as the total exfoliation of MMT in polyurethane urea matrix, characterized by the disappearance of the absorption peak which is responsible for layered structure has been proved by the WAXS method. Physic-mechanical tests demonstrated an increase in film strength of the polymer nanocomposite compared to the polyurethane matrix by 40% at a sufficiently low MMT (0.5%) content." @default.
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- W2038000948 date "2013-01-01" @default.
- W2038000948 modified "2023-10-18" @default.
- W2038000948 title "Monmorillonite Modified with Oligourethane Ammonium Chloride and Based Nanostructured Polymers" @default.
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- W2038000948 doi "https://doi.org/10.11648/j.nano.20130104.13" @default.
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