The plot of the logarithm of the storage tensile modulus (log E0 )and tanG at 1 Hz vs temperature for unfilled
NR matrix, and both unmodified and modified jute reinforced rubber composites are shown in Fig. 6a and 6b,
respectively. At low temperatures, the NR matrix is in the glassy state and E0 is around 4E+11 Pa. Then at ca. -60o
C a sharp drop in E0, associated with the glass–rubber transition of the elastomer. This relaxation phenomenon
involves cooperative motions of long chain sequences which induce dissipation energy revealed by a maximum in
tanG (Fig. 6b). After filled NR matrix with DPNR treated fiber, E0 increased to 8E+11 Pa higher than untreated
fiber