Creep deformation of poly(methyl methacrylate)-multiwalled carbon nanotube composites

Man Fang Chang, Fuqian Yang, Sanboh Lee

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Considering the long-term structural stability of polymer-nanotube composites under different service conditions, we investigate the tensile creep of polymer-nanotube composites consisting of poly(methyl methacrylate) (PMMA) and multiwalled carbon nanotubes (MWCNTs). The PMMA is pre-irradiated by ultraviolet light with different doses to change the molecular weight. The creep deformation of the PMMA-MWCNT composites with the weight fraction of MWCNTs in a range of 0 to 0.7 wt.% in a temperature range of 50 to 80 °C is well described by a Maxwell standard model with parallel connection between a spring, E1, and a Maxwell element (a dashpot, η, in the series connection with a spring, E2). The value of E1 is a linear function of the inverse of the normalized weight fraction with the average values of the coefficients/constants for the linear relation being increasing functions of the weight fraction of MWCNTs. The value of η is a power function of the molecular weight with a power index of ~3.3. The activation energy for the creep deformation of the PMMA-MWCNT composites increases with the increase of the weight fraction of MWCNTs.

Original languageEnglish
Article number343
JournalJournal of Polymer Research
Volume27
Issue number11
DOIs
StatePublished - Nov 1 2020

Bibliographical note

Publisher Copyright:
© 2019, The Polymer Society, Taipei.

Keywords

  • Activation energy
  • Composite
  • Creep
  • MWCNTs
  • PMMA

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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