Page 262 - Handbook of Plastics Technologies

ELASTOMERS

4.54 CHAPTER 4

TABLE 4.11 Peroxide Decomposers

dilauryl-β,β-thiodipropionate

β-naphthyl disulfide

thio-β-naphthol

2-mercaptobenzothiazole

benzothiazyl disulfide

phenothiazine

tris(p-nonylphenyl)phosphite

zinc dimethyldithiocarbamate

For molecular layers of the rubber polymer, this is shown schematically in Scheme 18.
If there is sufficient strain in the vulcanized rubber, even if the ozonide reforms, it does so
in a manor to permit a crack to form and grow.
Effective chemical antiozonants share certain common functions as follows:
1. They react directly with ozone.
2. They migrate to the surface of the rubber product to react with ozone.
3. They decrease the rate of cut crack growth.

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