This cover by Dongcheng Sun and colleagues is of polyurethane dispersions TEM micrographs taken at different magnifications and different areas. Polyurethane ionomers were synthesized by reactive extrusion in a twin-screw extruder and then dissolved in solvent, added water to disperse and distilled off the solvent to obtain the polyurethane dispersions which have high solid-content and excellent adhesive properties. This showed the particles shape, sizes and size distributions of the polyurethane dispersions. DOI: 10.1002/app.47719

Representation of a drilling rig and different geological formations (left). Microscopy images of highly compacted clay before the contact with water (center). Clay swelling caused by water led to the occurrence of several microfractures (top right). PEDA effectively minimized the clay swelling (bottom right).

Possible mechanism for synergistic effect of combined lubricants on the wood flour/polypropylene composite.

Synthesis strategy and surface morphology of PUE

Rheological behaviors of fracturing fluid using amine boron composite crosslinker at 100 °C and borate crosslinker at 90 °C.

Dependence of notched impact strength on reactive blending temperature.

The flux and anti-fouling performance of the unmodified membrane and Fe₂O₃ incorporated membrane.

The induction of anticoagulant activity by blending PES with SF or SZ while the induction of antibacterial activity by blending PES with Cu₂O.

Addition of Mg(C₄H₉)₂ to the Ziegler catalyst (a combination of TiCl₄ and Al(C₂H₅)₂Cl) at a [Mg]:[Al] molar ratio <0.5 leads to the formation of a highly active catalyst system for polymerization of propylene to mostly atactic amorphous polymers.