Get access

Effects of prior aging at 288°C in argon environment on time-dependent deformation behavior of a thermoset polymer at elevated temperature, part 1: Experiments

Authors

  • Amber J. W. McClung,

    1. Department of Aeronautics and Astronautics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433-7765
    Search for more papers by this author
  • Marina B. Ruggles-Wrenn

    Corresponding author
    1. Department of Aeronautics and Astronautics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433-7765
    • Department of Aeronautics and Astronautics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433-7765
    Search for more papers by this author

  • The views expressed are those of the authors and do not reflect the official policy of the United States Air Force, Department of Defense, or the US Government.

  • This article is a US Government work and, as such, is in the public domain in the United State of America.

Abstract

The inelastic deformation behavior of PMR-15 neat resin, a high-temperature thermoset polymer, aged at 288°C in argon environment for up to 2000 h was investigated. The experimental program was designed to explore the influence of prior isothermal aging on monotonic loading and unloading at various strain rates. In addition, the relaxation response and the creep behavior of specimens subjected to prior aging of various durations were evaluated. All tests were performed at 288°C. The time-dependent mechanical behavior of the PMR-15 polymer is strongly influenced by prior isothermal aging. The elastic modulus increased and the departure from quasi-linear behavior was delayed with prior aging time. Stress levels in the region of inelastic flow increased with prior aging time. Furthermore, prior aging significantly decreased the polymer's capacity for inelastic straining, including the material's capacity to accumulate creep strain. Conversely, the relaxation response was not affected by the prior aging. © 2009 Wiley Periodicals, Inc.† J Appl Polym Sci, 2009

Get access to the full text of this article

Ancillary