Poly(ethylene Terephthalate) Carbon-Based Nanocomposites: A Crystallization and Molecular Orientation Study

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Hybrid polymeric materials with carbon nanostructures offer unique properties.
• Carbon nanotubes (CNTs) are promising for polymer reinforcement, but their full potential requires further research.
• Polymer matrix morphology and molecular orientation significantly influence composite properties.

Purpose of the Study:

• To investigate the effect of multiwall carbon nanotubes (MWCNTs) on the crystallization and orientation of polyethylene terephthalate (PET) composites.
• To assess the impact of MWCNTs on the final properties of PET nanocomposites.
• To achieve optimal dispersion of MWCNTs within the PET matrix using functionalization.

Main Methods:

• Utilized functionalized multiwall carbon nanotubes (MWCNTs) to reinforce polyethylene terephthalate (PET).
• Characterized composite physical properties, including crystallinity and orientation, using differential scanning calorimetry (DSC), X-ray diffraction (XRD), and polarized Raman microscopy.
• Investigated the impact of MWCNTs on the crystallization behavior and molecular orientation of the PET matrix.

Main Results:

• Well-dispersed MWCNTs acted as effective nucleation agents for PET.
• The addition of MWCNTs significantly increased the crystallization of the PET matrix.
• Differentiated orientation of both MWCNTs and PET macromolecular chains was observed in the composites.

Conclusions:

• Functionalized MWCNTs enhance the crystallization and molecular orientation of PET composites.
• MWCNTs serve as nucleation sites, promoting increased crystallinity in the PET matrix.
• The study demonstrates the potential of MWCNT-reinforced PET for advanced material applications.