Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 136, Issue 17, Pages -Publisher
WILEY
DOI: 10.1002/app.47373
Keywords
aging; mechanical properties; structure-property relationships; theory and modeling; thermoplastics
Categories
Funding
- Solvay Specialty Polymers (Alpharetta, GA)
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In this study, the aging-induced embrittlement of three polymer glasses is investigated using a previously developed hybrid experimental-numerical method. The evolution of yield stress of unnotched tensile bars upon aging is coupled to the evolution of embrittlement of notched tensile bars using a numerical model combined with a critical hydrostatic stress criterion that determines the onset of failure. The time-to-embrittlement of notched tensile bars with a different notch geometry is predicted and in good agreement with the experimentally determined value. Next to that, the approach is extended to three polysulfone polymers, and it is shown that the value of the critical hydrostatic stress correlates well with the polymers entanglement density: : polymers with a denser entangled network display higher values, that is, a higher resistance against incipient cavitation. (c) 2019 The Authors. Journal of Applied Polymer Science published by Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47373.
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