Functionalization of polyolefin melts containing carbon nanotubes and the properties of their blends with polyamide 6
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Yuri M. Krivoguz
,
Olga A. Makarenko
Abstract
The effect of multiwalled carbon nanotubes (MWNT) on the course of reactive-extrusion-free-radical grafting of trans-ethylene-1, 2-dicarboxylic acid onto linear low-density polyethylene (LLDPE) and ethylene-propylene copolymer (c-PP) containing ≈7 wt.% ethylene units was studied. The extrusion reactor was the material cylinder of the twin-screw extruder TSSK-35/40 (screw diameter 35 mm; length/diameter ratio=40; 10 independent heating zones). It was found that the extent of the influence of MWNT depends on their concentration and on the PO character. It is shown that monomer grafting efficiency can be improved with a MWNT concentration of ≈0.05 wt% in the reactive system. In free-radical grafting of the cross-linkable LLDPE, the MWNT (≥0.1 wt%) were shown to inhibit the concurrent process of macromolecular cross-linking; in the case of c-PP, which predominantly undergoes degradation during functionalization, the concurrent reactions were observed to accelerate catalytically. In the case of polyamide 6/LLDPE blends, the MWNT promote the strengthening of melt flow junctures that formed during the filling of the die-mold cavity.
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Articles in the same Issue
- Frontmatter
- Original articles
- Functionalization of polyolefin melts containing carbon nanotubes and the properties of their blends with polyamide 6
- Electrical percolation in composites of conducting polymers and dielectrics
- Tris(hydroxydietylene)-2-hydroxypropane-1,2,3-tricarboxylate for rigid PUR-PIR foams
- Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior
- Morphology of poly(3-hydroxybutyrate)–polyvinyl alcohol extrusion films
- Preparation and characteristics of polypropylene-clay nanocomposite fibers
- Poly(ethylene terephthalate)/poly(ethylene-co-vinyl alcohol) sheath-core fibers: preparation and characterization
- Effects of different starch types on the physico-mechanical and morphological properties of low density polyethylene composites
- Morphology and thermomechanical properties of epoxy composites highly filled with waste bulk molding compounds (BMC)
Articles in the same Issue
- Frontmatter
- Original articles
- Functionalization of polyolefin melts containing carbon nanotubes and the properties of their blends with polyamide 6
- Electrical percolation in composites of conducting polymers and dielectrics
- Tris(hydroxydietylene)-2-hydroxypropane-1,2,3-tricarboxylate for rigid PUR-PIR foams
- Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior
- Morphology of poly(3-hydroxybutyrate)–polyvinyl alcohol extrusion films
- Preparation and characteristics of polypropylene-clay nanocomposite fibers
- Poly(ethylene terephthalate)/poly(ethylene-co-vinyl alcohol) sheath-core fibers: preparation and characterization
- Effects of different starch types on the physico-mechanical and morphological properties of low density polyethylene composites
- Morphology and thermomechanical properties of epoxy composites highly filled with waste bulk molding compounds (BMC)
