Enhanced miscibility of low-molecular-weight polystyrene/polyisoprene blends in supercritical CO2

Article Abstract:

Blend composition and the level of carbon dioxide (CO2) pressure have been found to create a potent impact on the cloud point temperature of polymer blends. Visual experiments conducted on low-molecular-weight polystyrene and polyisoprene proved that the the temperature of polymer blends may significantly be reduced by as much as 28 degree Celsius under the action of supercritical carbon dioxide (scCO2). It was also shown that the miscibility of scCO2 may be enhanced by improving its plasticizing effectiveness and tunable solubility.

Research, Usage, Carbon dioxide, Supercritical fluid chromatography, Polystyrene

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Microwave-assisted one-step synthesis of polyacrylamide-metal (M=Ag, Pt, Cu) nanocomposites in ethylene glycol

Article Abstract:

Polyacrylamide-metal (M=Pt, Ag, Cu) nanocomposites with metal nanoparticles homogeneously dispersed in the polymer matrix is prepared with the corresponding metal salt and acrylamide monomer in ethylene glycol by microwave heating. The method is based on a single-step simultaneous formation of metal nanoparticles and polymerization of the acrylamide monomer, leading to a homogeneous distribution of metal nanoparticles in the polyacrylamide matrix.

Atomic properties, Polyacrylamide, Nanoparticles

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Pressure effect on the 3-D magnetic ordering of a quasi-1-D enantiopure molecular magnet

Article Abstract:

Magnetic measurements of the quasi 1-D molecular magnet formed by the coordination polymer of purely organic alpha-nitronyl nitroxide radical and manganese(II) ions, namely [(R)-3MLNN-Mn(hfac)(sub 2)], is carried out under pressure up to 10 kbar at low temperatures. The results obtained show that the temperature of 3-D ferromagnetic ordering of the 1-D ferrimagnetic chains in this molecular magnet increases substantially under pressure.

Analysis, 3-D films, 3-D movies

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