Recent Progress in Rubber Chemistry and Technology |
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According acid action active nitrogen group Archief ascer barytes breaking stresses Brit bromine caoutchouc Carbon black caustic soda cent character Chem chemical coagulation combined sulphur content comparatively compound connection considerable cord correct cure correct technical crude rubber distensibility Eaton ebonite effect elongation employed energy of resilience fabric Goldsbrough grade Hellendoorn hexavalent sulphur India Rubber Journal Indust ingredients isoprene Lamp black latex latter litharge magnesia mainly material mechanical properties method Mineral accelerators moulds nature obtained oleic acid ordinary organic accelerators organic catalysts over-curing oxidation oxygen ozonide pale crêpe particle Patent Peachey piperidine plantation rubber production progress qualities quantity rapid curing regard result rubber industry rubber manufacturers Schidrowitz Slow curing rubbers smoked sheet solid tyre specific gravity standard stress/strain curve synthetic temperature testing trees type or slope tyre industry tyre tread variability volume increase Vries vulcanisation process vulcanised rubber weft writer zinc oxide
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Page 29 - Dec. 4, 1920. ation in the state of molecular aggregation (corresponding to or producing "tackiness"), during which oxygen functions mainly as a catalyst, and the second a series of chemical reactions in which the active participation of oxygen is promoted by the formation of an auto-catalyst—• probably a peroxide (corresponding to or producing "perishing"). The action of Light is complicated and curious. In the presence of oxygen " tackiness" (in crude rubber) or " perishing" (in the case of...
Page 56 - Wiegand1 pointed out in 1920 that since the wear of a tire tread consists in the gouging or tearing out of small masses of rubber, the resistance to abrasive wear might depend on the amount of work performed in stretching the rubber to rupture. A chart accompanying this suggestion showed that, for a compound containing 25 volumes of channel black per 100 volumes of rubber, this work was greater than for compounds containing other...
Page 23 - The progress of vulcanisation is physically and mechanically of a definitely progressive character, and its progress can be accurately represented graphically by a series of stress-strain curves.
Page 24 - In the above an is a constant for any given set of curves; n represents the increase of stretch per increment of load, ie, slope or " type" hence — or — =distensibility, and a = toughness or an n J tenacity and b = limit of extension.