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Physical properties of polymers–an introductory discussion
Author(s) -
Smith Thor L.
Publication year - 1973
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760130302
Subject(s) - superposition principle , viscoelasticity , materials science , polymer , relaxation (psychology) , elastomer , time–temperature superposition , statistical physics , phenomenological model , scale (ratio) , polymer science , thermodynamics , composite material , condensed matter physics , physics , mathematics , mathematical analysis , quantum mechanics , psychology , social psychology
Physical characteristics of isolated molecules and bulk polymers are discussed briefly. The broad spectrum of mechanical properties resulting from changes in temperature and experimental time‐scale is introduced by first considering the time‐independent properties of elastomers under large deformations and then the effect of a progressive decrease in segmental mobility, leading eventually to glassy characteristics. The phenomenological theory of linear viscoelasticity along with time‐temperature superposition is outlined, and illustrative data are presented. Finally, phenomena resulting from volumetric relaxation processes are considered briefly.