Properties of PP/MWCNT-COOH /PP composites made by melt mixing versus solution cast /melt mixing methods

An approach on improvement of the properties of polypropylene / carbon nanotube (PP/CNT) composites is reported. PP blend compositions with carboxylic acid functionalized multi-walled carbon nanotubes (MWCNT-COOH) at filler content 1.0 wt.% were researched. One part of the composites was manufacture...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2015-01, Vol.77 (1), p.12013
Main Authors: Reinholds, I, Roja, Z, Zicans, J, Meri, R Merijs, Bitenieks, J
Format: Article
Language:English
Subjects:
Carboxylic acids
Composite materials
Crystallites
Crystallization
Differential scanning calorimetry
Elongation
Fillers
Glass transition temperature
Mechanical analysis
Mechanical properties
Melts
Modulus of elasticity
Multi wall carbon nanotubes
Nanostructure
Polymer matrix composites
Polypropylenes
Storage modulus
Tensile strength
Tensile tests
Thermal stability
Thermoplastic resins
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Summary:An approach on improvement of the properties of polypropylene / carbon nanotube (PP/CNT) composites is reported. PP blend compositions with carboxylic acid functionalized multi-walled carbon nanotubes (MWCNT-COOH) at filler content 1.0 wt.% were researched. One part of the composites was manufactured by direct thermoplastic mixing PP with the filler, but the other one was made from solution casted masterbatch with the following thermoplastic mixing. An increase of mechanical properties (Young's modulus, storage modulus and tensile strength), compared to an increase of glass transition temperature indicated a reinforcement effect of CNTs on PP matrix, determined from the tensile tests and differential mechanical analysis (DMA), while the elongation was reduced, compared to PP matrix. By differential scanning calorimetry (DSC) analysis, the effect of nanofiller on the reorganization of PP crystallites was observed. A noticeable enhanced effect on increase of the crystallization temperature was indicated for masterbatch manufactured composite. An increase of thermal stability was also observed, compared to pristine PP and the composite made by direct thermoplastic mixing PP with the filler.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/77/1/012013