Relaxation and retardation time for polymeric liquids

[hanson]

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.

 

[chemisttree]

What do you mean by relaxation time and retardation time?