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A bouncemeter for measuring resilience
Author(s) -
Rodriguez F.,
Acevedo M. A.
Publication year - 1997
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/(sici)1097-4628(19971128)66:9<1787::aid-app18>3.0.co;2-s
Subject(s) - resilience (materials science) , natural rubber , composite material , thermoplastic elastomer , materials science , elastomer , ball (mathematics) , thermoplastic , square root , mathematics , geometry , polymer , copolymer
A device has been constructed which gives a convenient and reproducible measure of the resilience of elastic materials including thermoplastic elastomers as well as conventional crosslinked rubber. A steel ball strikes the surface of the firmly anchored sample at an angle of 45°. The horizontal distance traveled (the bounce distance), is recorded by having the ball make a mark in a shallow bed of fine gravel. In the common Lüpke and Bashore devices, the rebound of a metal element usually is estimated while the element is still in motion. It is shown that the bounce distance B is proportional to the square root of the Bashore or Lüpke rebound. All resilience tests are sensitive to the thickness of the sample used. However, tests with various rubbers and thermoplastic elastomers confirm that the square root relationship holds reasonably well for samples that are 1.27 cm thick over the range of 10 to 85% Bashore rebound. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1787–1793, 1997