How the rheological properties of solutions of graft copolymers depend on the length and number of graft chains

Conclusions 1. We have studied the rheological properties of concentrated solutions of graft copolymers consisting of compatible (nitrocellulose-polymethylacrylate) and incompatible (secondary cellulose acetate/polymethacrylic acid, cellulose triacetate/polymethylmethacrylate) polymers.2. The results are explained from the viewpoint of the effect of the molecular weight of the graft chain on the microheterogeneity of the structural elements in solutions of graft copolymers.Moscow Textile Institute. Translated from Khimicheskie Volokna, No. 6, pp. 18–19, November–December, 1969.     

Microstructure and Strength of Ceramics Prepared from Powders Synthesized Via Simultaneous and Sequential Deposition Routes

Sol-gel techniques for simultaneous and sequential deposition of precursor powders for preparation of ceramics in the ZrO₂ – Al₂O₃ – CeO₂ system are described. The phase composition of ceramics varies with the method of powder deposition. The intracrystallite arrangement pattern of the secondary phase in the system obtained via simultaneous deposition route provides the base for a ceramic that is superior in strength characteristics to ceramic prepared from ZrO₂ – Al₂O₃ powders deposited via sequential route.