Natural and Synthetic Rubbers

Natural and Synthetic Rubbers

“…A review by Tomic-Metrovic (30 (7) pertained to the investigation and prevention of aging in vulcanized rubber.…”

“…Through analyses of cracking, Katsenis and Partridge (19C) studied the ozone resistance of neoprene vulcanizates, and Pickard (33 (7) the ozone resistance of butyl vulcanizates. Schaef (37( 7) described a crack volume test which he considered a quantitative means for determining ozone damage to elastomers.…”

“…Schaef (37( 7) described a crack volume test which he considered a quantitative means for determining ozone damage to elastomers. Thornleyr (39 (7) made separate studies of ozone cracking of rubber produced under static exposure and dynamic exposure to demonstrate the essential differences between flex cracking and ozone cracking. In addition he studied the influence on cracking of such factors as the type of protection, the degree of reinforcement, and the influence of previous aging.…”

“…Wilcox (31C) also described recent advances in ozone testing. Zuev and Pravednikova suggested a method for testing the ozone resistance of new rubbers based on the time for cracks to appear and the time to failure at several deformations, ozone concentrations, and temperatures (34 (7) ; and after studying the influence of ozone concentration upon cracking of vulcanized rubbers decided that the best index of ozone resistance was the concentration of ozone required to produce rupture in a given time (SBC).…”

“…A number of papers have been included that, while they do not present specific new methods, either give general background or present fundamental information which should be helpful in the development of new methods. As in the case of previous reviews (1)(2)(3)(4)(5)(6)(7)(8)(9), test methods applied to compounding or other ingredients usually have been omitted, except for those involving their qualitative or quantitative determination in rubber. Similarly, methods devised to test the raw materials used in the manufacture of synthetic rubbers have also been omitted.…”