Effect of Temperature on Mechanical Properties of Nanoclay Reinforced Polymeric Nanocomposites. Part 1. Experimental Results
CITY COLL NEW YORK DEPT OF MECHANICAL ENGINEERING
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In this paper the effect of temperature and nanoclay reinforcement percentage on nanoclay reinforced polymeric nanocomposites is studied. First, polypropylene PP 3371 resin reinforced with various nanoclay percentages is tested at room, elevated and low temperatures. The tests are conducted on ASTM Type I specimens instrumented with strain gages in an MTS machine equipped with an environmental chamber. Next to ascertain the effect of various PP resins, nanoclay reinforced Borealis and TP 3868 tensile specimens are tested from low to elevated temperatures. In addition nanoclay reinforced epoxy specimens are tested at room temperature. The test results are plotted as stress-strain curves and the mechanical properties of the nanocomposites including Youngs modulus, Poissons ratio, ultimate stress and failure strain are determined. The tensile test results indicate that the Youngs modulus of the nanocomposite increases with increasing nanoclay reinforcement percentage. The temperature has even a more significant effect. It was observed that as the temperature decreases the material becomes brittle, has higher stiffness and fails at lower strains. High temperatures have the opposite effect, in that, as the temperature increases the material loses stiffness and becomes more ductile. Temperature and nanoclay reinforcement affect the Poissons ratio also, but this effect is less significant. In general, as the temperature increases the Poissons ratio also increases. However, an increase in nanoclay reinforcement generally reduces the Poissons ratio. It is also noted that the type of resin used may have a significant effect on the mechanical properties of the nanocomposite.
- Polymer Chemistry
- Laminates and Composite Materials