Transcription of Mechanical Properties
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Mechanical Properties
CHAPTER 33 Mechanical Properties OF RUBBERR onald J. SchaeferINTRODUCTIONR ubber is a unique material that is both elastic and viscous. Rubber parts can there-fore function as shock and vibration isolators and/or as dampers. Although the termrubberis used rather loosely, it usually refers to the compounded and vulcanizedmaterial. In the raw state it is referred to as an forms chem-ical bonds between adjacent elastomer chains and subsequently imparts dimen-sional stability, strength, and resilience. An unvulcanized rubber lacks structuralintegrity and will flow over a period of has a low modulus of elasticity and is capable of sustaining a deformationof as much as 1000 percent.
on the elastomer. Oxidation causes a softening effect in NR, IR, and IIR. In most other elastomers the oxygen causes cross-linking and the formation of stiffer com-MECHANICAL PROPERTIES OF RUBBER 33.3 8434_Harris_33_b.qxd 09/20/2001 12:30 PM Page 33.3
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