Abstract
Elastomer‐rich thermoplastic polyolefin (ETPO) resin containing 70 wt% maleated styrene‐ethylene‐butadiene‐styrene (SEBS‐g‐MA) and 30 wt% polypropylene and its nanocomposites filled with 1–5 wt% SiC nanoparticles (SiCp) were fabricated using extrusion and injection molding techniques. The mechanical and thermal behaviors of ETPO and its nanocomposites were investigated. Tensile measurements showed that the SiCp additions lead to reductions in both tensile stiffness and strength of ETPO. However, Izod impact and EWF measurements indicated that the impact strength and fracture toughness of ETPO improve substantially with increasing SiCp content. This demonstrated that SiC nanoparticles toughen the ETPO blend effectively. Furthermore, SiCp additions were found to improve the thermal resistance of ETPO blend considerably.
Highlights
Thermoplastic polyolefin (TPO) blends consisting of polypropylene (PP) and elastomer components find extensive industrial applications in the automotive and construction sectors because of their low cost, low density, good weather resistance, and recycling characteristics
The SiC nanoparticles are found to disperse in the PP phase, but most SiCp dispersed in SEBS-g-MA phase are removed by THF during etching (Figures 3(b) and 3(c))
The tensile strength of Elastomer-rich thermoplastic polyolefin (ETPO) blend decreases from 6.92 MPa to 6.21 MPa by adding 3–5 wt% SiCp
Summary
Thermoplastic polyolefin (TPO) blends consisting of polypropylene (PP) and elastomer components find extensive industrial applications in the automotive and construction sectors because of their low cost, low density, good weather resistance, and recycling characteristics. They can be processed like thermoplastics but maintain the resilience and elasticity behaviors of elastomers. For rubber-poor TPO blends and composites, the rubber phase disperses as spherical domains in PP matrix and contributes to improved toughness of these materials. The effect of nanoclay additions on the structure and property of rubber-rich TPO blends has Journal of Nanomaterials from Saudi Arabia. (styrene-ethylene-butylene-styrene) elastomer grafted with 1.84 wt% of maleic anhydride
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