the intensity ratio was unchanged for the nonirradiated latex mixture (spectrum c, Figure 5) compared to the signal for the
pure NR latex (spectrum b, Figure 5). This ratio decreased from 0.68 for the nonirradiated latex mixture (spectrum c,
Figure 5) to 0.65 (spectrum d, Figure 5) for the 1 h irradiated latex mixture.
In view of this 4% reduction in the intensity ratio(spectra c and d, Figure 5) as a result of irradiation, the amount of CC in the films made from nonirradiated NR latex was unaffected by the presence of the coagent and the photoinitiator.
In other words, cross-linking of the rubber chains cannot occur in the presence of the photoinitiator and the coagent, unless UV irradiation is used