Structure-property relationships in polypropylene/poly(ethylene-co-octene)/multiwalled carbon nanotube nanocomposites prepared via a novel eccentric rotor extruder
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Cong Meng
Abstract
In this work, polypropylene/poly(ethylene-co-octene)/multiwalled carbon nanotube (PP/POE/MWCNT) nanocomposites with different contents of MWCNTs were prepared by an eccentric rotor extruder to obtain engineering materials with excellent performance capability. Microphotographs (scanning electron microscopy and transmission electron microscopy) and dynamic mechanical analysis indicate that the MWCNTs were well dispersed in the polymer matrix under the elongation flow. The crystallization behavior was explored by X-ray diffraction and differential scanning calorimetry. The results show that MWCNTs promote heterogeneous nucleation and improve the To, Tc and Te values of the composites. On the basis of the rheology analysis, the complex viscosity of the PP/POE/MWCNT composites increased and formed an obvious Newton plat in the low-frequency range; both the G′ and G″ of all the samples increased monotonically, and a percolation threshold appeared for 1 wt% MWCNTs. Thus, the mechanical properties of the nanocomposites prepared under an elongation flow lead to an effective strengthening of PP/POE better than under a shear flow. This work provides a novel method based on elongational rheology to prepare engineered materials that possess excellent performance capabilities.
Acknowledgments
The authors wish to acknowledge the National Natural Science Foundation of China (grant nos. 51435005 and 51505153), the PhD Start-up Fund of Natural Science Foundation of Guangdong Province, China (grant no. 2016A030310429), the National Natural Science Foundation of China-Guangdong Joint Foundation Project (grant no. U1201242), the Special-Funded Program on National Key Scientific Instruments and Equipment Development of China (grant no. 2012YQ230043), the Science and Technology Programme of Guangzhou Municipal Government (grant no. 2014J4100012), and the Science and Technology Planning Project of Guangdong Province, China (grant no. 2014B090921006).
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©2018 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Material properties
- Structural, optical, and aging studies of biocompatible PVC-PVP blend films
- Structure-property relationships in polypropylene/poly(ethylene-co-octene)/multiwalled carbon nanotube nanocomposites prepared via a novel eccentric rotor extruder
- Swelling behavior of poly (N-hydroxymethylacrylamide-co-acrylic acid) hydrogels and release of potassium nitrate as fertilizer
- Preparation and assembly
- Preparation of poly(L-lactide)/poly(ethylene glycol)/organo-modified montmorillonite nanocomposites via melt intercalation under continuous elongation flow
- Engineering and processing
- Glass fiber–reinforced polypropylene composites fabricated by direct fiber feeding injection molding
- Dip coated stretchable and bendable PEDOTPSS films on low modulus micro-bumpy PDMS substrate
- Influence of a locally variable mold temperature on injection molded thin-wall components
- Process control strategies for injection molding processes with changing raw material viscosity
- Three-dimensional numerical simulation of total warpage deformation for short-glass-fiber-reinforced polypropylene composite injection-molded parts using coupled FEM
- Three-dimensional viscoelastic numerical analysis of the effects of gas flow on L-profiled polymers in gas-assisted coextrusion
Artikel in diesem Heft
- Frontmatter
- Material properties
- Structural, optical, and aging studies of biocompatible PVC-PVP blend films
- Structure-property relationships in polypropylene/poly(ethylene-co-octene)/multiwalled carbon nanotube nanocomposites prepared via a novel eccentric rotor extruder
- Swelling behavior of poly (N-hydroxymethylacrylamide-co-acrylic acid) hydrogels and release of potassium nitrate as fertilizer
- Preparation and assembly
- Preparation of poly(L-lactide)/poly(ethylene glycol)/organo-modified montmorillonite nanocomposites via melt intercalation under continuous elongation flow
- Engineering and processing
- Glass fiber–reinforced polypropylene composites fabricated by direct fiber feeding injection molding
- Dip coated stretchable and bendable PEDOTPSS films on low modulus micro-bumpy PDMS substrate
- Influence of a locally variable mold temperature on injection molded thin-wall components
- Process control strategies for injection molding processes with changing raw material viscosity
- Three-dimensional numerical simulation of total warpage deformation for short-glass-fiber-reinforced polypropylene composite injection-molded parts using coupled FEM
- Three-dimensional viscoelastic numerical analysis of the effects of gas flow on L-profiled polymers in gas-assisted coextrusion
