The crystallization of polypropylene in multiwall carbon nanotube-based composites

The crystallization process of isotactic polypropylene (iPP) was studied under both dynamic and isothermal conditions for a series of multiwall carbon nanotube (MWCNT) composites with nanotube concentrations between 0.1 and 1.0% by weight. The nucleation activity of the nanofillers was confirmed for...

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Bibliographic Details
Published in:Polymer composites 2011-02, Vol.32 (2), p.324-333
Main Authors: Marco, Carlos, Naffakh, Mohammed, Gómez, Marián A., Santoro, Gonzalo, Ellis, Gary
Format: Article
Language:English
Subjects:
Applied sciences
Carbon
Composites
Crystallization
Exact sciences and technology
Forms of application and semi-finished materials
Nanocomposites
Nanomaterials
Nanostructure
Polymer industry, paints, wood
Polymer matrix composites
Polypropylenes
Technology of polymers
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Summary:The crystallization process of isotactic polypropylene (iPP) was studied under both dynamic and isothermal conditions for a series of multiwall carbon nanotube (MWCNT) composites with nanotube concentrations between 0.1 and 1.0% by weight. The nucleation activity of the nanofillers was confirmed for both dynamic and isothermal crystallization, and was shown to be composition dependent. The effect of the nanofiller on the crystallization of iPP was discussed using the temperature coefficients obtained to determine the interfacial free energy and free energy of nucleation. The basal interfacial free energy decreased with respect to that of neat iPP by up to 15% for as little as 0.1% MWCNT, subsequently decreasing linearly with increasing nanotube concentration. This behavior is in line with the crystallization behavior of iPP with conventional nucleating agents. POLYM. COMPOS., 2011. © 2010 Society of Plastics Engineers
ISSN:0272-8397
1548-0569
DOI:10.1002/pc.21059