6533b86dfe1ef96bd12c9fba
RESEARCH PRODUCT
Effect of the elongational flow on morphology and properties of polypropylene/graphene nanoplatelets nanocomposites
Manuela CerauloF. P. La MantiaMaria Chiara MistrettaLuigi Bottasubject
chemistry.chemical_classificationPolypropyleneNanocompositeMaterials scienceNanocompositePolymers and PlasticsOrganic Chemistry02 engineering and technologyPolymer010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical scienceschemistry.chemical_compoundchemistryPhase (matter)Ultimate tensile strengthGraphene nanoplatelets (GnP)FiberMelt spinningComposite materialPolypropylene0210 nano-technologyContact areaElastic modulusdescription
Abstract In this work the effect of the presence of graphene nanoplatelets (GnP) on the morphology and mechanical properties of polypropylene/GnP nanocomposites has been investigated when these polymer systems are subjected to non-isothermal elongational flow in a melt spinning operation. The presence of the GnP magnifies the effect of the elongational flow. Indeed, the elastic modulus and the tensile strength of nanocomposites increases with the orientation more than that observed for the pure matrix. Moreover, the elongation at break increases at low values of the draw ratio for the nanocomposites, while, the matrix shows the expected decrease in deformability. These effects have been correlated with the decrease in the dimensions of the nanoplatelets caused by the elongational flow. The increase of contact surface between matrix and dispersed phase is responsible for these behaviours since the larger contact area improves the transfer of the stress from matrix to GnP. The best performance was observed for the nanocomposite with the lower GnP content and this phenomenon has been again correlated with the minor size of the GnP in this nanocomposite sample.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-10-01 | Polymer Testing |