The reactions responsible for ozone-induced degradation of elastomers under stress were discussed briefly in Sect.B-II-3. Although this form of degradation is limited to unsaturated polymers, it is nonetheless of considerable importance. Degradation in the presence of ozone was first observed in natural rubber, but it is now known to take place in many synthetic elastomers as well. The general reaction is one of cleavage involving ethylenic double bonds in the backbone chain. Stabilization of natural rubber has been accomplished by both physical and chemical methods, and by a combination of the two approaches. Synthetic elastomers can also be protected against ozone-induced degradation using the same technology.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Stabilization Against Degradation by Ozone
Dr. W. Lincoln Hawkins
- Springer Berlin Heidelberg
in-adhesives, MKVS, Nordson/© Nordson, ViscoTec/© ViscoTec, Hellmich GmbH/© Hellmich GmbH