Search Results - (Author, Cooperation:V. V. Tsukruk)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2015-01-13Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1436-2449Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyMechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsNotes: Summary Molecular morphology of a surfaces of fibers and films from novel segmented polyimides with different rigidity of the backbones was studied by atomic force microscopy. It was observed that surface morphology on a molecular scale is formed by straight segments arranged in a {1–10} plane for polymide fiber and in a {010} plane for polyimide film. Z-shaped backbone segments at the fiber surfaces are arranged at definite angles with respect to the fiber axis. The parameters of unique cells, positional correlations and the arrangement of molecular segments at the interface are discussed.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 1573-4803Source: Springer Online Journal Archives 1860-2000Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsNotes: Abstract Scanning force microscopy (SFM) was used for probing nanomechanical properties of compliant polymeric materials with lateral resolution from 20 to 140 nm and indentation depths from 2 to 200 nm. Sneddon's, Hertzian, and Johnson–Kendall–Roberts theories of elastic contacts were tested for a variety of polymeric materials with Young's modulus ranging from 1 MPa to 5 GPa. Results of these calculations were compared with a Sneddon's slope analysis widely used for hard materials. It was demonstrated that the Sneddon's slope analysis was ambiguous for polymeric materials. On the other hand, all models of elastic contact allowed probing depth profile of elastic properties with nanometre scale resolutions. The models gave consistent values of elastic moduli for indentation depth up to 200 nm with lateral resolution better 100 nm for most polymeric materials.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 1573-8310Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyProcess Engineering, Biotechnology, Nutrition TechnologyType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesGlavati, O. L. ; Kurilo, S. M. ; Kravchuk, G. G. ; Gordash, Yu. T. ; Shilov, V. V. ; Tsukruk, V. V. ; Lokhonya, O. A.
Springer
Published 1989Staff ViewISSN: 1573-8310Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyProcess Engineering, Biotechnology, Nutrition TechnologyType of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesLipatov, Yu. S. ; Dmitruk, N. V. ; Tsukruk, V. V. ; Shilov, V. V. ; Priss, L. S. ; Dashevsky, L. I.
New York, NY [u.a.] : Wiley-Blackwell
Published 1984Staff ViewISSN: 0021-8995Keywords: Chemistry ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyMechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsNotes: Structural studies of oligobutadienediol-based polyurethanes with various degrees of crosslinking were carried out. From absolute small-angle X-ray scattering, the degree of segregation of components was determined. It was concluded that a complete microphase separation of the different components is realized in all samples irrespective of the degree of crosslinking, and these polymers are two-phase systems. While stretching, the fibrillar structure is formed.Additional Material: 4 Ill.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesTsukruk, V. V. ; Šilov, V. V. ; Lipatov, Ju. S. ; Konstantinov, I. I. ; Amerik, Ju. B.
Weinheim : Wiley-Blackwell
Published 1982Staff ViewISSN: 0323-7648Keywords: Chemistry ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyPhysicsDescription / Table of Contents: A series of polymers having pendant phenylbenzoate groups of different length was investigated by detailled x-ray measurements within a wide range of temperature. Very long flexible terminal chains were found to penetrate each other. Increase in temperature results in improved liquid-crystalline structure of polymers having methacrylate main chains but in less significant structural features with polymers based on acrylate main chains at T 〉 Tg.Notes: An einer Polymerreihe mit seitlichen Phenylbenzoatgruppen verschiedener Länge wurden eingehende röntgenographische Untersuchungen in einem weiten Temperaturbereich durchgeführt. Es konnte gezeigt werden, daß sehr lange flexible endständige Ketten ineinander eindringen. Eine Temperaturerhöhung führt zur Verbesserung der kristallin-flüssigen Struktur bei Polymeren mit Methacrylat-Hauptkette und zu einer gewissen Verschlechterung bei Polymeren mit Acrylat-Hauptkette bei T 〉 Tg.Additional Material: 8 Ill.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 0323-7648Keywords: Chemistry ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyPhysicsDescription / Table of Contents: Die Besonderheiten der übermolekularen Strukturierung in flüssig-kristallinen Polymeren mit mesogenen Seitengruppen bzw. mesogenen Gruppen in der Hauptkette werden beschrieben. Es wird gezeigt, daß die nematischen und cholesterischen Mesophasen in den Polymeren makroskopisch geordnete Phasen sind, ähnlich wie in niedermolekularen flüssigen Kristallen. Smektische Polymere sind mikroheterogene Systeme mit komplizierten Ebenen der übermolekularen Struktur, wie Schichtpakete und daraus aufgebaute Aggregate.Notes: Features of supermolecular organization in liquid-crystalline polymers with mesogenic side groups and mesogenic groups in the main chains are described. The nematic and cholesteric mesophase in polymers are shown to be macroscopic ordered phases similar to low-molecular liquid crystals. Smectic polymers are microheterogeneous systems with complicated levels of supermolecular structures: layered packs and their aggregates.Additional Material: 11 Ill.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 0098-1273Keywords: Physics ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyPhysicsNotes: X-ray studies on polymers with phenyl benzoate side groups separated from the main chain by spacer groups of various lengths have been performed. It was found that the dimensions of liquid-crystalline regions are 15-20 nm, and they contain four to six close-packed layers. Thermal changes in x-ray scattering are associated with the variation of sizes and concentration of liquid-crystalline regions determined by the mobility of the main chain.Additional Material: 3 Ill.Type of Medium: Electronic ResourceURL: