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EV sulfur system

Another study used 13C NMR to examine the thermal ageing of NR with both peroxide and conventional and EV sulfur vulcanised samples [59]. The samples were heat aged at 70 °C in air with 13C NMR recorded after 3 and 21 days. The vulcanisate structures vulcanised by peroxide and the EV sulfur system showed low sensitivity to ageing effects while peaks in the conventional sulfur system almost disappeared after 21 days of ageing. In addition, the main chain isoprene carbon peaks showed considerable broadening due to increasing stiffness of the network. [Pg.348]

Figure 5.24 Tearing energy versus tear rate at 23 °C of vulcanized NR latex filmfperoxide pre-vulcanized), black-filled NR (semi-EV sulfur system) and peroxide-cured unfilled NR (SMR L). Figure 5.24 Tearing energy versus tear rate at 23 °C of vulcanized NR latex filmfperoxide pre-vulcanized), black-filled NR (semi-EV sulfur system) and peroxide-cured unfilled NR (SMR L).
See other pages where EV sulfur system is mentioned: [Pg.180]    [Pg.200]   
See also in sourсe #XX -- [ Pg.156 ]



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