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An environmental instrument for measuring creep and stress relaxation in polymers
Author(s) -
Machin D.,
Rogers C. E.
Publication year - 1970
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1970.070141116
Subject(s) - creep , stress relaxation , materials science , stress (linguistics) , polymer , characterization (materials science) , relaxation (psychology) , composite material , atmosphere (unit) , ultimate tensile strength , range (aeronautics) , nanotechnology , thermodynamics , physics , psychology , social psychology , philosophy , linguistics
The construction and operation of an instrument for measuring tensile stress relaxation and creep, particularly of polymers, is described. The instrument is comparatively inexpensive to build and enables measurements to be carried out in vacuo or in a controlled atmosphere of gas or vapor. The design is based on principles used for some earlier stress relaxometers modified to enable characterization of samples having a very wide range of moduli either as stress relaxation or, additionally, as creep measurements. The instrument can therefore be used to evaluate material properties of hard plastics or of soft rubbers when exposed to selected environments.