The elastic moduli and mechanical damping of a range of polymeric restorative materials have been determined using a torsion pendulum. Composite materials have high moduli and low damping compared with unfilled resin. These materials have stable mechanical properties, but variation occurred as a result of different specimen conditioning methods.
Non-destructive testing was valuable in that it allowed repeated testing of a single specimen.
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References
1.
Mccrum, N.G.; Read, B.E.; and Will-Iams, G.: Anelastic and Dielectric Effects in Polymeric Solids. London: John Wiley, 1967.
2.
Eisenberg, A. : Mechanical Spectroscopy of Polymeric Solids . Polym Preprints14(2): 696-707,1973.
3.
Karas, G.C. and Warburton, B.: Dynamic Mechanical Testing of Polymers, Part 1. British Plastics , 34(3), 131, 1961.
4.
Nielsen, L.E.: Mechanical Properties of Polymers. New York: Reinhold, 1962.
5.
Astm: Standard Method of Test for Dynamic Mechanical Properties of Plastics by Means of a Torsion Pendulum . ASTM D2236-70,1970.
6.
Deutsche, Norman: Testing of Plastics: Torsion Pendulum Test. DIN 53445, 1965 .
7.
Heijboer, A.: In Physics of Non-crystalline Solids (J. A. Prins, Ed.), New York: Interscience , 1965.
8.
Yim, A.; Chapal, R.S.; and Pierre, L.E.: The Effect of Polymer-filler Interaction Energy on the Tg of Filled Polymers . J Coll and Interface Sci43(3):583, 1973.
