"Relaxation" is one of the most important concepts in the Polymer Physics courses. There are many derivative terms related to the term " relaxation"

such as relaxation process

relaxation time spectrum

mechanical relaxation

dielectric relaxation

stress relaxation and secondary relaxation

etc. In this paper

these terms were brought together and interpreted respectively. Learners can understand these concepts very well so that they can no longer be confused by their similar names. Relaxation phenomenon is a macroscopic expression of the molecular motions in matter. In absolute sense

all the substances have relaxation phenomena. However

the relaxation phenomenon of the polymers is the most prominent among all the materials. The molecular mechanism of the polymer relaxation phenomenon is revealed.