Nondestructive testing of defects in adhesive joints

4. Swelling index
The swelling indices of different filler content of two roll mill as well as Brabender
processed SBR nanocomposites are shown in Fig.-6 Lower swelling in case of Brabender
processed nanocomposites is due to greater cross linking of SBR because of a uniform dispersion
of nano CaCO3 which brings the chains closer and keep them intact with nanofiller.
Swelling Index
0.6
0.5
0.4
0.3
0.2
0.1
0
0 1 2 3 4 5
Filler content (w t%)
Tw o roll mill
Brabender
Figure 5. Swelling index of SBR filled with nano CaCO3 processed on two roll mill (TRM)
and Brabender Plastograph
5. Surface morphology
The surface morphology of fractured SBR nanocomposites prepared on Brabender and
two roll mill mixing technique were investigated by Scanning Electron Microscope (SEM)