Effect of microstructure uncertainty and testing frequency on storage and loss moduli of injection molded MWCNT reinforced polyamide 66 nanocomposites

Xiangyu Xu, Seyed Hamid Reza Sanei, Erik Steinmetz, Anne Margaret Gohn, Jason Williams

Research output: Contribution to journalArticle

Abstract

The viscoelastic behavior of multiwall carbon nanotube (MWCNT) reinforced polyamide 66 (PA 66) was evaluated to investigate the effect of CNT content and loading frequency on dynamic moduli (i.e. storage modulus E′ and loss modulus E″) and damping factor tanδ. PA 66/CNT disk samples with five different CNT contents ranging from 3 wt % to 15 wt % were manufactured by injection molding. Testing was performed over the frequency range of 0.1–100 Hz at room temperature. Dynamic mechanical analysis results show that the mechanical properties are highly functions of tested frequency and the improvement on loss and storage modulus of nanocomposites with the addition of CNT is highly dependent on tested frequencies. The variability in loss modulus is significantly higher than the variability in the storage modulus indicating the correlation of loss modulus with uncertainties present in nanocomposite microstructure while storage modulus is essentially independent of microstructure for a given reinforcement content.

Original languageEnglish (US)
Article number106455
JournalPolymer Testing
Volume85
DOIs
StatePublished - May 2020

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

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