ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Experimental measurements are described of the propagation of a cut through a stretched rubber sheet under the action of an atmosphere containing ozone. It is shown that a well-defined rate of cut growth may be determined which is characteristic of growth through the bulk and substantially independent of the applied tensile stress when this exceeds a critical value necessary for growth to occur at all. The effect of the polymer employed, the vulcanization system used, the degree of crosslinking, and the presence of fillers and plasticizers on the characteristic rate of cut growth is examined. The effects of temperature in the range 2-80°C., and ozone concentration in the range 0.2-2.5 mg. of ozone/I. are also studied. It is concluded that the rate at which a cut advances in highly reactive polymers is principally determined by the rate of incidence of ozone molecules and, for relatively viscous polymers, by the restricted mobility of polymer chains. The degree of crosslinking and the vulcanization system adopted appear to be of secondary importance, while the presence of fillers has a negligible effect.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1960.070030713
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