Rheological investigation of shear-enhanced crystallization for polylactide composites with different aspect ratio carbon nanotubes
-
Zhaohua Xu
and
Heng Li
Abstract
Crystallization processes of polylactide (PLA)/acid oxidized multiwalled carbon nanotube (A-MWCNT) composites were detected by dynamic rheological measurements. The influences of pre-shear, crystallization temperature, concentration and aspect ratio of A-MWCNT, on the crystallization kinetics of PLA, were investigated. The addition of small amounts of A-MWCNT, can more or less accelerate the crystallization of the PLA matrix. Composites with smaller aspect ratio A-MWCNT (A-MWCNT–S) show faster crystallization rates than those with larger aspect ratio A-MWCNT (A-MWCNT–L), due to the more heterogeneous nucleation sites of the former. Pre-shear can significantly promote the crystallization process of PLA composites, and with the increase in shear rate, the crystallization rate becomes faster. Pre-shear results in an accelerated crystallization compared to PLA/A-MWCNT–S composites at the same concentration, without pre-shear, due to a more serious deformation from entanglement to orientation of A-MWCNT–L.
©2012 by Walter de Gruyter Berlin Boston
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- Study of rheological and mechanical properties of ternary blends of iPP/LDPE/EPDM
- Rheological investigation of shear-enhanced crystallization for polylactide composites with different aspect ratio carbon nanotubes
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- Masthead
- Masthead
Articles in the same Issue
- Original Articles
- Study of rheological and mechanical properties of ternary blends of iPP/LDPE/EPDM
- Rheological investigation of shear-enhanced crystallization for polylactide composites with different aspect ratio carbon nanotubes
- In situ formation of nano-scale PMMA network structures on the surface of immiscible polymer blends by solvent extraction and redeposition
- Effect of various additives on mechanical properties of rice husk polypropylene (RHPP) composites
- The unusual creep and relaxation behaviour of polypropylene
- Influence of MMT as reinforcement on rheological behavior, mechanical and morphological properties of recycled PET/ABS thermoplastic nanocomposites
- Preparation and properties of melt blended metallocene polyethylene/silica nanocomposites: modifier effects
- Tribological performance of industrial polyamide-imide and its composite under different cooling conditions
- Preparation of high molecular weight and elastic copolyester by reactive extrusion with diisocyanate compound for laser printing process
- Masthead
- Masthead
