Zobrazeno 1 - 10
of 64
pro vyhledávání: '"V.A. Vilenskii"'
Publikováno v:
Genij Ortopedii. :34-39
3Санкт-Петербургский Государственный Университет 4 Ветеринарная клиника «Нежный зверь», г. Санкт-Петербург
Publikováno v:
Polymer Science U.S.S.R.. 32:394-399
Low-angle X-ray scattering, scanning calorimetry and thermomechanical analysis have been used to investigate polyurethane (PU) and PU-ionomers whose flexible blocks are mixtures of incompatible oligomers. Quaternarization of the tertiary nitrogen ato
Autor:
N.I. Levchenko, Yu.Yu. Kercha, V. I. Shtompel, S.A. Sukhorukova, V.A. Vilenskii, A. P. Grekov
Publikováno v:
Polymer Science U.S.S.R.. 32:1438-1443
Carboxyl containing anionomer polyurethanes are studied in relation to the quantity of neutralizing agent. Neutralization does not accelerate microphase separation in ionomers. Excess neutralizing agent results in the formation of N − … K + type
Publikováno v:
Polymer Science U.S.S.R.. 25:1328-1336
A series of phosphorus-containing block copolyurethanes distinguished by the structure of the rigid blocks has been studied by DTA, thermomechanical analysis, stress relaxation on constant deformation and X-ray diffraction at low scatter angles. It i
Publikováno v:
Polymer Science U.S.S.R.. 27:1210-1217
The effect of structure-formation on physical and mechanical properties of compositions obtained by mixing oligoether and oligoester melts was studied by X-ray diffraction analysis, scanning calorimetry and thermomechanical method. Physical and mecha
Publikováno v:
Polymer Science U.S.S.R.. 19:301-312
The structure of polyurethane block copolymers (segmented polyurethanes) has been investigated by low angle X-ray diffraction and electron microscopy. It was found that substitution of a polar for a non-polar substituent in the side group of the chai
Publikováno v:
Polymer Science U.S.S.R.. 18:1039-1045
A study was made of the thermal and thermo-mechanical behaviour of thermo-elastoplastic polyurethane semicarbazides (PUS) of segmental structure by DTA, dynamic dilatometry, thermomechanics and using a torsional pendulum. It was shown that the comple
Autor:
Yu.S. Lipatov, V.A. Vilenskii
Publikováno v:
Polymer Science U.S.S.R.. 17:2389-2396
A study was made of the behaviour at different temperatures of incompatible polymer mixtures by dynamic dilatometry and isothermal compression. Both homopolymers and polymer mixtures were examined. This study seeks to verify the applicability of the
Publikováno v:
Polymer Science U.S.S.R.. 29:1512-1517
The authors have studied by small angle X-ray scatter and scanning calorimetry the segmented PUs the flexible component of which was a mixture of an oligoether and oligoester. It is shown that successive change in MM and polarity of the flexible segm
Autor:
R.K. Valetdinov, V.I. Shtompel, L.N. Korsakova, Yu.Yu. Kercha, R.L. Shapoval, D.F. Yakovenko, V.A. Vilenskii
Publikováno v:
Polymer Science U.S.S.R.. 27:1129-1136
It has been shown, using several structural-mechanical methods that by a change in polarity, thermodynamic flexibility and degree of affinity of the structural elements of the rigid block, the degree of segragation of blocks of various rigidities can