WebOzone cracking was one explanation of the presence of the brittle cracks, especially since they were spaced at intervals of about 10 mm corresponding to the spaces between the … WebJan 31, 2013 · The degradation of polymer straps induced by ozone oxidation discussed above can be explained by oxidative crosslinking and oxidative aging, which lead to …
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WebOzonolysis. Criegee Mechanism. Ozonolysis allows the cleavage of alkene double bonds by reaction with ozone. Depending on the work up, different products may be isolated: reductive work-up gives either alcohols or carbonyl compounds, while oxidative work-up leads to carboxylic acids or ketones. WebJun 29, 2016 · Adequate protection from ozone cracking is possible through a combination of an understanding of the polymers being used, correct selection of the additive package, appropriate compound processing ... river transport news
(PDF) The effect of ozone on polymer degradation in Polymer Core …
WebA well-defined rate of crack growth is obtained, substantially independent of the applied tensile stress when this exceeds a critical value necessary for growth to occur at all. The rate of growth is found to be similar for a number of polymers and principally determined by the ozone concentration when the mobility of the polymer molecules is ... http://www.polymerdatabase.com/polymer%20chemistry/Depolymerization.html WebSusceptible elastomers. Tiny traces of ozone in the air will attack double bonds in rubber chains, with natural rubber, polybutadiene, styrene-butadiene rubber and nitrile rubber being most sensitive to degradation. Every repeat unit in the first three materials has a double bond, so every unit can be degraded by ozone. Nitrile rubber is a copolymer of butadiene … smokin with cigarettes