Synthesis and characterization of polypyrrole‐au coated SiO₂@poly(4‐vinylpyridine) composites

Abstract

Microspheres with silica as core and poly(4‐vinylpyridine) (P4VP) as shell were synthesized. AuCl 4− ions were bound by P4VP chains to form the complex, which acted both as an oxidant of pyrrole monomers and as a source of Au atoms. By vapor phase polymerization, the PPy and Au nanoparticles were simultaneously formed on the surfaces of SiO2@P4VP microspheres. The core‐shell structure was confirmed by transmission electron microscopy. The surface morphologies of the composites were observed by scanning electron microscopy. The molecular structures of composites were characterized in detail by Raman spectra, X‐ray diffraction, and X‐ray photoelectron spectroscopy. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Molecular Bottlebrush Supported Mono(phenoxy–imine) Metal Complexes: Synthesis and Ethylene Polymerization

“…Polyethylene (PE) is the world’s most widely used polymer. Most of the PEs are industrially produced by using heterogeneous Ziegler–Natta catalysts and metallocene catalysts supported by inorganic particles such as silica, clay, and magnesium chloride . Although highly active, the residual inorganic components in the final polyolefin products may be detrimental to the polymer properties, such as mechanical and optical performances, compatibility during the plastic recycling, and so on .…”

Synthesis of Fe3O4@SiO2@MPS@P4VP nanoparticles for nitrate removal from aqueous solutions

“…The second stage of weight loss for @Si @MPS, curve a, (about 5%) up to 450 °C is due to degradation of MPS organic groups. Also in Figure , the second stage of weight loss for @Si @MPS@P4VP, curve b, (about 19%) is more than that of MPS‐modified Fe 3 O 4 @SiO 2 nanoparticles, which demonstrate that successful grafting of P4VP onto the surface of MPS‐modified Fe 3 O 4 @SiO 2 nanoparticles increased the content of organic groups . According to Figure , it is suggested that the content of MPS groups and P4VP layer is about 5% and 14%, respectively.…”