Relaxation and retardation time for polymeric liquids

AI Thread Summary
The discussion centers on understanding the typical values of relaxation and retardation times for various real materials, specifically mentioning blood and cervical mucus. Relaxation time refers to the time it takes for a material to return to equilibrium after deformation, while retardation time is the time it takes for stress to dissipate in a material. Participants express confusion over these definitions and seek clarity on the ratio of these time scales across different materials. Additionally, there is a request for reliable references or data sources to better understand these concepts and their applications in real-world materials.
hanson
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Hi all, I am wondering what the typical values of relaxation and retardation time for different real materials?
I know these times depend on quite a number of things.
But I just want to have a sense of the ratio of the two time scales for different real materials like blood, cervical mucus and other materials...

Do you have some good references for these data? I am kind of confused when I search online about it.
 
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What do you mean by relaxation time and retardation time?
 

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