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A new apparatus for measuring various properties of plastics using C specimens
Author(s) -
Ohishi F.
Publication year - 1971
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.1971.070150211
Subject(s) - materials science , birefringence , composite material , linear variable differential transformer , creep , photoelasticity , modulus , transformer , optics , solid mechanics , voltage , electrical engineering , physics , distribution transformer , engineering
A new apparatus for measuring various properties of plastics is proposed. Using a split circular ring‐type specimen (C specimen), displacement L , tension P , and fringe order N are measured by means of a differential transformer, a load cell, and a polarizeranalyzer. The Young's modulus and photoelastic sensitivity of samples can be estimated from L , P , and N . Experiments are carried out in the environments of air, water, oils, and chemical reagents under‐temperature controlled conditions. Typical data are, presented showing the applications of this apparatus to the determination of the heat distortion temperature and the effect of temperature on the rigidity and photoelastic properties, to the simultaneous measurement of stress relaxation and birefringence and of creep and birefringence, and to the continuous measurement of resistance to chemical reagents and ultraviolet rays.