Solid-phase extrusion of polyamide under simple shearPolymer Science, Series A - Tập 51 - Trang 916-922 - 2009
V. A. Beloshenko, A. V. Voznyak, Yu. V. Voznyak
The advantages of new simple-shear methods of severe plastic deformation
(equal-channel multiple angular extrusion, T-type extrusion, and twist
extrusion) are examined for polyamides from the viewpoint of the structural
modification of flexible-chain semicrystalline polymers. The effect of the
deformation scheme and mode and the extrusion temperature and rate on the
physicomechanical characteristi... hiện toàn bộ
Effect of the montmorillonite cloisite 15A on the structure and properties of poly(1-butene)Polymer Science, Series A - Tập 54 - Trang 493-498 - 2012
G. Kh. Idiyatullina, S. I. Vol’fson, R. K. Sabirov, R. S. Yarullin
The structure and properties of nanocomposites based on poly(1-butene) and the
nanoclay Cloisite 15A are studied. The nanoclay introduced into poly(1-butene)
(5 wt %) is an efficient additive that improves mechanical and thermal
properties of poly(1-butene).
Prediction of glass transition temperatures of polyquinolines and polyquinoxalinesPolymer Science, Series A - Tập 54 - Trang 48-60 - 2012
Yanli Liu, Zhengde Tan, Shihua Zhang
Two molecular descriptors calculated directly from repeating units were used to
predict the glass transition temperature (T g) values of polyquinolines and
polyquinoxalines. These polymers were randomly divided into a training set (44
polymers) and a test set (19 polymers). By applying stepwise multiple linear
regression analysis, the training set was used to construct a quantitative
structure-pro... hiện toàn bộ
The effect of electric discharges on electrophysical properties of polymer blendsPolymer Science, Series A - Tập 52 - Trang 295-298 - 2010
A. A. Aliev, O. A. Ledneva, A. A. Popov
The electric aging of HDPE-PP blends obtained from melt and PS-PVC blends
prepared from solution is studied in the range of low (0.1–10 wt %)
concentrations of the second component. It is found that the addition of a minor
amount of PE (1–2 wt %) to PP significantly intensifies changes in the electric
properties and erosion of PP. For a PS-PVC blend, the addition of small (up to 1
wt %) amounts of... hiện toàn bộ
The effect of the polymerization mechanism on the microstructure of chains and the rheology of polyacrylonitrile solutionsPolymer Science, Series A - Tập 53 - Trang 289-295 - 2011
N. M. Bol’bit, E. A. Dubova, V. R. Duflot, V. A. Chevychelov
The analysis of theoretical published data and our experimental data makes it
possible to assume that the main difference between polyacrylonitriles prepared
via emulsion and solution polymerization appears at the stage of synthesis. This
difference is likely related to the freezing of the segmental mobility of
strongly sorbed two-dimensional chains that grow in a reaction gap of the latex
polymer... hiện toàn bộ
Temperature dependence of the structure of a carbosilane dendrimer with terminal cyanobiphenyl groups: Molecular-dynamics simulationPolymer Science, Series A - Tập 55 - Trang 53-60 - 2013
D. A. Markelov, M. A. Mazo, N. K. Balabaev, Yu. Ya. Gotlib
The molecular-dynamics simulation of the structure and molecular mobility of an
individual macromolecule of a fourth-generation carbosilane dendrimer with
terminal cyanobiphenyl groups in a highly diluted chloroform solution in the
range 213–323 K is performed. Upon a change in temperature, the dendrimer
undergoes structural rearrangement that depends on the ability of terminal
segments to penetra... hiện toàn bộ
The study of sorption and transport properties of membranes containing polyanilinePolymer Science, Series A - Tập 52 - Trang 856-863 - 2010
A. Yu. Pulyalina, G. A. Polotskaya, L. M. Kalyuzhnaya, N. N. Saprykina, I. G. Sushchenko, T. K. Meleshko, A. M. Toikka
The transport properties of membranes based on polyimide-polyaniline composites
are studied in the pervaporation separation of a methanol-toluene binary
azeotropic mixture. The morphology of the membranes is investigated by
electronic microscopy, and the wettability of their surface is analyzed by
contact-angle measurements. Special attention is given to the study of sorption
and diffusion charact... hiện toàn bộ