Porous fibres of a polymer blend for broadband microwave absorption

Evolution of self-generating porous microstructures in polyacrylonitrile-cellulose acetate blend fibres

• Gyration under pressure was used to spin polyacrylonitrile-cellulose acetate blend fibres. • Self-generating porous structures were obtained by controlling working pressure. • Artificial porous fibrous structures were made by leaching and etching. • Structural evolution inpolyacrylonitrilecellulose acetate blend fibres is ex-

Thermal patterning of a critical polymer blend.

Utilizing the Soret effect, we have employed a moderately focused laser beam (30 microm, 20 mW) to write spatial composition patterns into layers of the critical polymer blend poly(dimethyl siloxane)/poly(ethyl-methyl siloxane) (PDMS/PEMS, M(w)=16.4/22.8 kg/mol) both in the one- and in the two-phase region a few degrees above and below the critical temperature T(c)=37.7 degrees C. Because of th...

Interdiffusion in a polydisperse polymer blend.

We present a theoretical description of interdiffusion in a binary blend of polymers that exhibit polydispersity in length. The diffusion equations are formulated in terms of the volume fractions and the chain concentrations of the components. This choice of variables is equivalent to the assumption that the local molecular weight distributions of the components are described by the Flory distr...

Fabrication and Characterization of Polymer Blend Doped With Metal Carbide Nanoparticles for Humidity Sensors

Nanocomposites films of (polymer blend-ceramics) were prepared from (PVA-PAA) blend and (PVA-PAA) blend doped with niobium carbide nanoparticles for humidity sensors have low cost, easy fabrication, high sensitivity, lightweight and high corrosion resistance. The structural, electrical and optical properties of (PVA-PAA-NbC) nanocomposites have been studied. The D.C electrical properties of (PV...

Polarization anisotropy of charge transfer absorption and emission of aligned polymer: fullerene blend films