STRUCTURAL-MECHANICAL PROPERTIES OF SYSTEMS BASED ON POLYURETHANE BLOCK-COPOLYMERS
Yurii M. Mikhailov, Yurii M. Lotmentsev, Liudmila V. Ganina, Yurii B. Kalmykov, Nataly N. Ilicheva, Mikhail S. Kiselev
Pagini: 95-103
Publicat: 1 Jan 2012
Vizualizări: 314
Descărcări: 28
Rezumat: The structure and physical mechanical properties of individual and plasticized polyurethane block- copolymers with alternating flexible and rigid blocks have been investigated. A different degree of association between “rigid” blocks with a function of physical cross-linkages has been identified. The influence of the nature and plasticizer content on intermolecular interactions degree and the deformation - strength characteristics of the studied systems has been demonstrated. Constants “C1” and “C2” of Muni-Rivlin equation have been calculated. The effective density of the physical network increased at low concentrations of plasticizer. However, it decreased monotonically upon a further increase of the degree of the plasticization. If plasticizer concentration was more than the thermodynamic compatibility with the copolymer we observed a considerable loss of the elastic and strength properties the binary system. A selectivity effect of the plasticizers has been shown.
Cuvinte cheie: polyurethane, block copolymer, thermoelastoplast, domain structure, plasticizer, physical mechanical properties, deformation, strength
Citează acest articol: Yurii M. Mikhailov, Yurii M. Lotmentsev, Liudmila V. Ganina, Yurii B. Kalmykov, Nataly N. Ilicheva, Mikhail S. Kiselev. STRUCTURAL-MECHANICAL PROPERTIES OF SYSTEMS BASED ON POLYURETHANE BLOCK-COPOLYMERS. Journal of International Scientific Publications: Materials, Methods & Technologies 6, 95-103 (2012). https://www.scientific-publications.net/en/article/1003240/
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