Many spheres of influence: Surface coating of monodisperse polystyrene (PS) nanosphere seeds with a phenol‐containing polymer (PF) and then silica forms a dual core–shell structure PS@PF@SiO2 (see picture). Subsequent pyrolysis results in discrete, dispersible, and uniform hollow carbon nanospheres (HCSs). The outer silica shell serves as a nanoreactor and thus prevents the polymer and carbon layers from conglutination and sintering.

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The use of inorganic (glass) fiber reinforcement to enhance the mechanical properties and reduce the anisotropy of in situ composites based on blends of liquid crystalline polymers (LCPs) with polyetherimide (PEI) is discussed. It was found that the tensile and flexural moduli are increased and the anisotropy is reduced with increasing glass content (when compared at equivalent LCP weight fractions). The creep compliance of the PEI/LCP composites is reduced upon the addition of glass fibers. However, the disadvantage is that the processability worsens upon addition of glass fibers to the PEI/LCP in situ composites. The effect of adding glass reinforcement on the ultimate tensile strength is less clear, because the data do not show any consistent trend. Similarly, the elongation at break and toughness do not show any consistent improvement upon addition of glass reinforcement. Morphological studies show that there is considerable difference between the size and texture of the reinforcing glass fibers and LCP microfibrils.

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In this article, sheet boehmite (AlOOH), which was synthesized via a facile and environmental friendly method, was used as reinforcing agent to toughen Bisphenol A epoxy resin. The result of X-ray Diffraction (XRD) and IR spectrum indicated that the as-synthesized product was pure crystalline and high purity AlOOH. The effects of sheet AlOOH on the mechanical properties of AlOOH/epoxy nanocomposites were investigated. The results indicated that the introduction of AlOOH significantly improved the mechanical properties of epoxy resin. Compared with neat epoxy resin, the tensile strength and the fracture toughness (K IC ) of the AlOOH/epoxy nanocomposites filled with 4 wt % AlOOH increased by 24.2% and 28.7%, respectively, while the flexural strength increased from 40.92 to 50.00 MPa. From Scanning Electron Microscope (SEM), a phase-separated morphology and plenty of cervices and river branches were observed in the fractured surfaces of composites. With the increase of sheet AlOOH content, river-shaped cracks became more and more intensive. Overall, the addition of sheet AlOOH is shown as a promising method for mechanical properties enhancement of epoxy matrix.

Kern‐Schale‐Schale: Die stufenweise Oberflächenbeschichtung monodisperser Polystyrol(PS)‐Nanokügelchen mit einem phenolhaltigen Polymer (PF) und mit Siliciumdioxid resultiert in dualen PS@PF@SiO2‐Kern‐Schale‐Strukturen (siehe Bild), deren Pyrolyse einheitliche, diskrete und dispergierbare hohle Kohlenstoff‐Nanokügelchen (HCSs) ergibt. Die äußere Siliciumdioxidschale wirkt als Nanoreaktor, der das Verkleben und Zusammenbacken der Polymer‐ und Kohlenstoffpartikel verhindert.

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