Time-Dependent Response of Polypropylene/Clay Nanocomposites Under Tension and Retraction

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Abstract

Observations are reported in relaxation tests under
tension and retraction on polypropylene/clay nanocomposites
with various contents of filler. A two-phase
constitutive model is developed in cyclic viscoelasticity
and viscoplasticity of nanocomposites. Adjustable parameters
in the stress–strain relations are found by fitting
the observations. Ability of the constitutive equations
to describe characteristic features of the timedependent
behavior of nanocomposites under cyclic
deformation is confirmed by numerical simulation. POLYM.
ENG. SCI., 00:000–000, 2012. ª2012 Society of Plastics
Engineers
Original languageEnglish
JournalPolymer Engineering and Science
Volume53
Issue number5
Pages (from-to)931-940
Number of pages10
ISSN0032-3888
DOIs
Publication statusPublished - 2013

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