Publications on the project |
055 Modifiсation of montmorillonite with oligourethane ammonium cloride for preparation of polyurethane nanocomposites |
Authors: | A.N. Gonchar, Yu.P. Gomza, Yu.V. Savelyev | |
Summary: | In order to create nanocomposites based on polyurethanes, polyamides and other polar polymers, a method of modification of montmorillonite with urethane-containing modifier has been first developed. Modified montmorillonite obtained is designed to form nanostructured composites based on polymers with polar groups, in order to obtain polymer composites with high physical and mechanical properties. New modifier ensures the high affinity of the montmorillonite with polymer matrix due to formation of hydrogen bonds. The complete exfoliation of the montmorillonite in the polyurethane matrix and increase of the strength of the polymer nanocomposite compared to the polyurethane matrix by 40 % at a relatively low concentration of montmorillonite (0.5 %) have been shown. | |
Keywords: | montmorillonite, nanocomposites, modification | |
Edition: | | | | 2011,
172-177,Ukrainian |
055 Montmorillonite Modified with Oligourethane Ammonium Chloride and Based Nanostructured Polymers |
Authors: | Savelyev Yu. V., Gonchar А.N., Travinskaya Т.V. | |
Summary: | Abstract:
For the purpose of developing polymer nanocomposites based on polar polymers - polyurethane and related polymers, a method of modifying the montmorillonite (MMT) with a new modifier, containing in its composition urethane groups has been elaborated. Exchange capacity of the MMT surface was determined by adsorption of methylene blue; the structure of modifier was confirmed by X-ray analysis, the content of the organic component in the modified MMT was measured by TGA. The resulting modified MMT is designed to form nanostructured composites on the basis of polymers having in its composition polar groups, including polyurethanes, with the aim to increase the physical and mechanical properties of based film materials. New modifier – oligouretane ammonium chloride provides high affinity of MMT with the polymer matrix due to the possibility of formation of hydrogen bonds. WAXS method has proved an intercalation of modifier into MMT interlayer space (increased distance between layers after modification by 0.68 nm), as well as the total exfoliation of MMT in polyuretane urea matrix, characterized by the disappearance of the absorption peak which is responsible for layered structure. 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%) concentration.
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Keywords: | organically modified montmorillonite, polymer-based nanocomposites, exfoliation, nanofiller-polymer affinity, high tensile strength | |
Edition: | American Journal of Nanoscience and Nanotechnology, 2013; 1(4); P. 87–93. | | | 2013,
87–93,English |
055 Modification of montmorillonite ooligouretanammony chloride to produce nanocomposites with polyurethane acrylate |
Authors: | A.N. Gonchar, M.Yu. Sokolov, Yu. V. Savelyev | |
Summary: | In order to create a polyurethaneacrylate based nanocomposites a method of montmorillonite (MMT) modification with methacrylate and urethane groups’ containing compound was first developed. The resulting modified MMT has been designed to form nanostructured composites on the basis of polyurethaneacrylates with the aim to increase the physical and mechanical properties of based film materials. The complete exfoliation of the modified MMT in the polyurethane matrix has been shown, as well as the and increase of the strength of the polymer nanocomposite compared with the polyurethane matrix in 2.82 times at concentration of the modified MMT of 3%. | |
Keywords: | | |
Edition: | | | | 2014,
118-123,Ukrainian |
055 New Montmorillinite Modifier for Creation of Polyurethane Acrylate/Organoclay Nanocomposites by in situ Polymerization |
Authors: | Savelyev Yu. V., Gonchar A.N., Travinskaya T.V. | |
Summary: | Abstract:
In order to create polymer nanocomposites on the basis of polyurethane acrylates with high performance properties the method of modification of montmorillonite (MMT) with a new modifier oligourethane methacrylate ammonium chloride (OUMAAC) has been developed. Exchange capacity of the MMT surface was determined by adsorption of indicator “methylene blue”. Intercalation of modifier into the interlayer space of MMT was confirmed by X-ray analysis; the content of organic component in the MMT modified with OUMAAC (MMT/M) was determined by thermogravimetric analysis. The resulting organoclay is purposed for the formation of nanostructured composites based on cross-linked polyurethane acrylates with improved physical and mechanical properties. The new modifier – oligourethane methacrylate ammonium chloride provides high affinity of MMT/M with polymer matrix due to the possibility of physical and chemical bonds formation. The intercalation of modifier into the interlayer space of MMT (increased on 0.7 nm distance between the layers after modification), as well as exfoliation of MMT/M in polyurethane acrylate matrix (disappearance of the absorption peak, which is responsible for the layered structure of MMT), was proved by X-ray analysis. The physic-mechanical tests of the polymer nanocomposite with MMT/M concentration of about 3% have shown the strength increase in almost 3 times as compared to polyurethane acrylate (PUA) matrix.
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Keywords: | montmorillonite, oligourethane methacrylate ammonium chloride, polyurethane acrylate, nanocomposites. | |
Edition: | Journal of Chemical Engineering and Chemistry Research Vol. 2, No. 2, 2015; P. 511–520. | | | 2014,
511–520,English |
The events in the framework of the project |
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055 2.3. Chemistry and physics of surface phenomena. Supramolecular structure Purpose:Development of methods for creating of hybrid polymers with elementsiloxan fragments of inorganic nature. Development of methods for modification of montmorillonite with different types of organic modifiers. Design and development of new functional cyclodextrin derivatives, chitosan and polymer composites with polyvinylpyrrolidone (PVP). Selection of proteins for investigation of the model reaction with cyclodextrins. Expected results:Release of new product: material Stage 1:Investigation of interaction of elementcomprising inorganic and complex compounds with model alkoxysilanes; chemical adsorption of montmorillonite modifiers; design and development of new functional cyclodextrin derivatives, chitosan and polymer composites with polyvinylpyrrolidone (PVP). Stage 2:Control of self-association of bissilan precursors by introduction into the reaction mixture of different compounds; modification of montmorillonite with modifiers of various types; development of protein, cyclodextrin and their derivatives based inclusion complexes. Stage 3:Study of the influence of self-association of bissilan precursors on structure formation in hybrid organic-inorganic polymers; creation of nanocomposites based on synthesized oligourethaneacrylates and linear polyurethanes with modified montmorillonite; obtaining of inclusion complexes between the recombinant protein - EMAP-IIf and β-cyclodextrin (β-CD) and its functionalized derivatives. Stage 4:Study of the properties of hybrid organic-inorganic polymers; Synthesis of specific modifiers for creation of polyurethane nanocomposites and montmorillonite modification; development and study of polymer composites based on cyclodextrins and various proteins; synthesis of cross-linked polymers and hydrogels based on cyclodextrin and other polymers. Stage 5:Development of methods for creation of purpose materials based on new supramolecular hybrid organic-inorganic polymers; creation of nanocomposites of polyurethane nature by filling with modified montmorillonite; study of physical, chemical, complexformation and catalytic properties of cyclodextrin and cyclodextrin based polymers.
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