The glass transition temperature (Tg) and tan
dmax at Tg of the filled NR vulcanizates are summarised in Table 4. It is starkly apparent that G0 increases consistently
with the filled vulcanizates when compared to gum NR
vulcanizates, especially at low temperature. G0 indicates
stored elastic energy in materials [14] thus, these results
justify that stored elastic properties were enhanced with
the filler filling of gum NR vulcanizates.