3.33 - Degradation of Natural Rubber and Synthetic Elastomers

Abstract

This chapter begins with some basic definitions and classifications of rubber and elastomers, followed by short discussions on the structure–property relationship and a brief introduction to rubber compounding and technology. The idea is to facilitate the understanding of readers who may have little background in the field of rubber science and technology, in view of the wide background of anticipated readership. The technology of bonding rubber to metal is an important aspect of protecting metal surfaces against corrosion, and this chapter covers all the important aspects of obtaining efficient bonding and high bond strength. Although rubbers protect metals against corrosion, they are also subject to corrosion brought about by degradation associated with oxidation, ozone cracking, heat aging, flex cracking and liquid absorption. Factors affecting the degradation of rubber and the means of protecting against degradation and the relevant mechanisms are also discussed.