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FLEX CRACK

Protection Against Flex Cracking. Most antioxidants including waxes provide oxidation protection under static conditions. However, most of them are not effective in mbber products subjected to dynamic flexing, eg, sidewall compounds in tires. The best dynamic protection is provided by either /V-alkyl-/V-phenyl or diaryl-/)-phenylene diamines. [Pg.246]

Protective Systems. As in the case of sulfur vulcani2ation, there have been many research workers in the field of natural mbber oxidation and its protection (39,40). The principal problem has always been to find an antioxidant that provides protection against flex-cracking, and yet does not stain. None has been found as of the mid-1990s, hence it is best to categori2e the various types according to their capabiUties. [Pg.270]

Flex cracking resistance Very good Good Good Good Good... [Pg.2473]

On the other hand, rubbers are exposed to repeated mechanical flexing and deformation in service. Previous studies [55] have shown that flex cracking of rubber materials is accelerated by the presence of oxygen. Environmental flex cracking is caused by oxidative chain scission of the rubber polymer at mechanically induced cracks. [Pg.642]

Figure 1. Flex crack test for film using the MIT Folding Endurance Tester... Figure 1. Flex crack test for film using the MIT Folding Endurance Tester...
The appearance on the surface of rubber products of cracks or fissures as a result of exposure to the atmosphere (atmospheric cracking) or to repeated bending or stretching (flex cracking). [Pg.20]

A machine for determining the resistance of elastomers to flex cracking. It is used particularly in the evaluation of shoe soling materials. Rotational Moulding... [Pg.54]

The most effective antioxidants for light coloured rubber compounds are the hindered bisphenols, but these offer little ozone and flex cracking resistance. [Pg.134]

Dihydroquinoline derivatives offer moderate antioxidant and flex cracking activity with excellent metal poison protection. [Pg.134]

Diaryl-phenylenediamines have very good antioxidant activity with good to moderate antiozonant characteristics, with low volatility but will possibly bloom to the rubber surface. They give very good flex cracking resistance. [Pg.135]

ISO 132 1999 Rubber, vulcanized or thermoplastic - Determination of flex cracking and crack growth (De Mattia)... [Pg.657]

See other pages where FLEX CRACK is mentioned: [Pg.377]    [Pg.358]    [Pg.246]    [Pg.270]    [Pg.550]    [Pg.538]    [Pg.543]    [Pg.20]    [Pg.480]    [Pg.558]    [Pg.84]    [Pg.86]    [Pg.88]    [Pg.88]    [Pg.91]    [Pg.109]    [Pg.109]    [Pg.463]    [Pg.477]    [Pg.477]    [Pg.1054]    [Pg.595]    [Pg.12]    [Pg.21]    [Pg.28]    [Pg.29]    [Pg.135]    [Pg.135]    [Pg.365]    [Pg.442]    [Pg.64]    [Pg.246]    [Pg.270]    [Pg.550]    [Pg.21]    [Pg.181]   
See also in sourсe #XX -- [ Pg.111 ]



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