Polypropylene‐Clay Nanocomposites: Comparison of Different Layered Silicates

Abstract

In former studies of the preparation of polypropylene(PP)‐clay nanocomposites, different types of layered silicates were used. However, the obtained results were not comparable due to different preparation conditions and types of silicates. The aim of this work was the investigation of the influence of different layered silicates on the properties of the resulting nanocomposites. FT‐IR‐spectra, SAXS, TEM micrographs, elemental analysis, mechanical properties and surface tension measurements were used for the comparison of the four different layered silicates under investigation.

Use of carbon nanotube filled polycarbonate in blends with montmorillonite filled polypropylene

“…They are due to the high incompatibility between the clay and unpolar polyolefins as visible also in the bad dispersion of the clay within polyolefins. For clay as used in the PP component of our blend system the surface tension was determined to be in the range of 26.5 and 27.5 mN/m [14] whereas, polypropylene has a surface tension at 260°C of about 16-18 mN/m [15,16]. This very high difference in surface tensions already indicates the high incompatibility.…”

Nanocomposites based on polyolefins and functional thermoplastic materials

“…Recent literature about PE,67–69, 74, 115–132 PP,64, 73, 75, 77–79, 133–156 syndiotactic polypropylene,157–160 poly(ethylene‐ co ‐propylene),56, 161, 162 polybutadiene and natural rubber163–165 and poly(ethylene‐ co ‐vinylacetate)166–169 layered silicate nanocomposites refers in detail to preparation,116–118, 121–123, 127–130, 132, 136, 161, 163, 164, 169 morphology development64, 67, 69, 78, 79, 120, 133–135, 139, 140, 144, 149, 150, 154, 157, 162 and thermal,75, 119, 126 mechanical,75, 76, 131, 142, 143, 151, 153, 160 rheo‐ logical, 155, 156 barrier124, 137 and flame resistance115, 126–138, 141 properties.…”

Improvement of the Mechanical Properties and Creep Resistance of SBS Block Copolymers by Nanoclay Fillers

“…[19] Nevertheless, these thermoplastic elastomer nanocomposites reveal clear improvements in ultimate strength and ductility whereas the addition of such organoclays to more standard thermoplastics such as poly(propylene) and polyamide-6 often leads to a severe degradation of the ductility and toughness. [28,29] Further evidence for the significantly altered micromechanical deformation behavior of the SBS nanocomposites explaining the observed improvements in composite ductility is provided by the representative scanning electron micrographs of fracture surfaces shown in Figure 4. In comparison to the rather featureless fracture surface of the neat SBS (Figure 4a), significant fibrillation of the SBS matrix takes place with the addition of 1.5 wt.-% organoclay (Figure 4b).…”