Effect of graphene nanoplatelets on coefficient of thermal expansion of polyetherimide composite

    Research output: Research - peer-reviewArticle

    • 12 Citations

    Abstract

    Thermal expansion is one of the major concerns for polymer composites. In this research, graphene nanoplatelets (GNPs) were added to polyetherimide (PEId) thermoplastic polymer in order to reduce the coefficient of thermal expansion (CTE) of the injection molded composite. First, the coefficient of linear thermal expansion (LTE) was measured in three directions in the anisotropic coupon: 0°, 90°and the out of plane Z direction. It is found that the GNP particles are very effective in terms of reducing the LTE in 0°direction due to high degree of alignment. After annealing above glass transition temperature, significant increase of 0°LTE and decrease of Z°LTE were observed. The bulk CTE was calculated by adding up the LTEs in all three directions and is found to be independent of annealing. Second, several models were applied to predict both CTE and LTE. It is found that Schapery's lower limit model fits the experimental CTE very well. Chow's model was applied for LTEs in three directions. The behavior of GNP-5/PEId composites is explained by the combination of Chow's model and morphology obtained by scanning electron microscope (SEM).

    LanguageEnglish (US)
    Pages26-36
    Number of pages11
    JournalMaterials Chemistry and Physics
    Volume146
    Issue number1-2
    DOIs
    StatePublished - Jul 15 2014

    Profile

    Graphite
    Thermal expansion
    Composite materials
    polyetherimide
    thermal expansion
    graphene
    composite materials
    coefficients
    Polyetherimides
    Graphene
    Direction compound
    Polymers
    Annealing
    local thermodynamic equilibrium
    annealing
    polymers
    Thermoplastics
    Electron microscopes
    Scanning
    Glass transition temperature

    Keywords

    • Annealing
    • Composite materials
    • Electron microscopy
    • Thermal expansion

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics

    Cite this

    Effect of graphene nanoplatelets on coefficient of thermal expansion of polyetherimide composite. / Wu, Huang; Drzal, Lawrence T.

    In: Materials Chemistry and Physics, Vol. 146, No. 1-2, 15.07.2014, p. 26-36.

    Research output: Research - peer-reviewArticle

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