Abstract
AbstractThe relative rates of relaxation and creep in shear, elongation, and isotropic compression are discussed in terms of the theory of linear viscoelasticity. Exact expressions are given for the creep rates; for the relaxation rates approximations are found which are useful in the glassy range where the amount of relaxation is small. Among the results of interest is the relation: valid if d In B/d In t is less than d In J/d In t as is intuitively expected and experimentally found. Here J(t), E(t), and B(t) are the shear, tensile, and bulk creep compliances, respectively. For polymers in the rubbery and flow regions, (d In J/d In t)/(d In D/d In t) is very close to 1(usually within 0.01%); in the glassy region, it is unlikely to be greater than 1.2.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Polymer Science: Polymer Physics Edition
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
