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Temperature dependence of the viscoelastic shift factor in ionomers
Author(s) -
Utracki L. A.
Publication year - 1982
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.760220206
Subject(s) - materials science , viscoelasticity , relaxation (psychology) , thermodynamics , styrene , modulus , dynamic mechanical analysis , dielectric , polymer chemistry , condensed matter physics , composite material , polymer , copolymer , physics , psychology , social psychology , optoelectronics
The temperature dependence of log a of poly(styrene ‐co‐ sodium methacrylate) was analyzed by means of the relation based on the free volume and the hole theories of liquids. For the near‐ T g region the relation becomes a single parameter equation of T / T g . The analysis revealed a transition in flow pattein at T T associated with disintegration of the ion multi plets. The T t ‐transition was previously detected in other theological functions, viz, relaxation modulus, mechanical and dielectric tan δ plots.