The Grignard metathesis (GRIM) polymerization of 3-alkylthiophenes proceeds by a quasi“living” chain growth mechanism, not by a step growth process. Kinetic studies of the Grignard metathesis polymerization of 2,5-dibromo-3-alkylthiophenes showed that the molecular weight of poly(3-alkylthiophenes) is a function of the molar ratio of the monomer to nickel initiator, and conducting polymers with...

The laser-induced luminescence studies of the rare earth titanates (R2Ti2O7) (R=La, Nd and Gd) using 355 nm radiation from an Nd:YAG laser are presented. These samples with submicron or nanometer size are prepared by the self-propagating high temperature synthesis (SHS) method and there is no known fluorescence shown by these rare earths in the visible region. Hence, the luminescence transition...

A wider utilization of ultra high temperature ceramics (UHTC) materials strongly depends on the availability of efficient techniques for their fabrication as dense bodies. Based on recent results reported in the literature, it is possible to state that Spark Plasma Sintering (SPS) technology offers a useful contribution in this direction. Along these lines, the use of two different SPS-based pr...

In this paper, the copper-based nanocomposites with TiO2 nanoparticles were synthesized by self-propagating high-temperature synthesis (SHS) process. The effect of different amounts excess copper, in comparison stoichiometric ratio (CuO:Ti ratios 1:1, 2:1, and 3:1), on phase formation achieved samples was studied. A thermodynamical study showed that increasing copper powder reduces adiabatic te...

In this work, the features of phase composition, structures, and properties coatings obtained on a high-speed steel substrate (steel R6M5) were studied. The prepared using ESA method (electro-spark alloying). Electrode materials through self-propagating high-temperature synthesis (SHS) based (Ti-B-Fe)xAlN with addition nanosized AlN particles in amount x = 0.5, 10, 15 wt % used as electrodes. s...

A coupled continuum-discrete numerical model is presented to study the synthesis of TiC nanosized aggregates during a self-propagating combustion synthesis (SHS) process. The overall model describes the transient of the basic mechanisms governing the SHS process in a two-dimensional micrometer size geometry system. At each time step, the continuum (micrometer scale) model computes the current t...