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. 1994 Mar-Apr;99(2):169–189. doi: 10.6028/jres.099.014

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 12 — Double logarithmic representation of a_te vs t_e for an epoxy glass aged at T_g −13.2°C. Symbols represent results from tests in which aging response was “probed” at different levels of applied stress: (□) 1 MPa; (○) 5 MPa; (Δ) 10 MPa; (◊) 15 MPa; (●) 20 MPa. (After Ref. [14b].)