Temperature and humidity effects on the mechanical properties of polymeric nanocomposites

R. Asmatulu, S. Gokathoti, H. Liao, C. Yip

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An environmental testing was conducted on polymeric nanocomposites fabricated by dispersing the carbon nanotubes (CNTs) into polymeric epoxy resins in order to determine their shelf life, reliability, stability, as well as other property changes as a function of temperature and humidity. In this study, various multi wall CNTs (∼140 nm diameter and ∼7μm length) ranging from 0.5% to 2.0% were initially dispersed in ethanol using a magnetic stirrer, and then an epoxy resin was added to the mixtures under continuous stirring. When the solvent completely evaporated after 18 hours of stirring, a hardener was added to the dispersion. The mixtures were then poured into rectangular shape molds and cured for 48 hours at the room temperature and pressure. Furthermore, a few samples of plain epoxy without nanotubes were also cast for comparison purposes. Dog-bone specimens were tested on a tensile testing machine after different hours of degradation in an environmental chamber. The experimental results showed that the yield stress, ultimate tensile strength and modulus of elasticity gradually reduced over time, indicating that nanocomposites were highly dependent on the humidity and temperature conditions. The results provide a useful guideline for a variety of applications of the nanocomposites in the future.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages965-970
Number of pages6
EditionPART B
ISBN (Print)9780791843857
DOIs
StatePublished - Jan 1 2010
EventASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009 - Lake Buena Vista, FL, United States
Duration: Nov 13 2009Nov 19 2009

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
NumberPART B
Volume12

Other

OtherASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009
CountryUnited States
CityLake Buena Vista, FL
Period11/13/0911/19/09

Keywords

  • Carbon nanotubes
  • Degradation and mechanical properties
  • Polymeric nanocomposite

ASJC Scopus subject areas

  • Mechanical Engineering

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  • Cite this

    Asmatulu, R., Gokathoti, S., Liao, H., & Yip, C. (2010). Temperature and humidity effects on the mechanical properties of polymeric nanocomposites. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009 (PART B ed., pp. 965-970). (ASME International Mechanical Engineering Congress and Exposition, Proceedings; Vol. 12, No. PART B). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2009-12337