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Nondestructive testing of defects in adhesive joints

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Figure 7. Scann<strong>in</strong>g Electron Micrographs <strong>of</strong> SBR -CaCO3 nanocomposites a) b) & c) For 1,<br />

3 and 5 wt% filler content processed on Two roll mill (TRM) and d) e) & f) For 1, 3 and 5<br />

wt% filler content processed on Brabender Plastograph<br />

Conclusion<br />

The nano-filler CaCO3 were synthesized <strong>in</strong> the laboratory. The re<strong>in</strong>forcement <strong>of</strong> nano<br />

filler CaCO3 <strong>in</strong> SBR improved the mechanical as well as thermal properties <strong>of</strong> prist<strong>in</strong>e SBR. The<br />

Brabender processed SBR nanocomposites as compared to two roll mill processes<br />

nanocomposites showed better improvement <strong>in</strong> properties because <strong>of</strong> more shear rate which<br />

results proper mix<strong>in</strong>g <strong>of</strong> all <strong>in</strong>gredients <strong>in</strong>clud<strong>in</strong>g filler <strong>in</strong> the matrix. Therefore uniform<br />

dispersion <strong>of</strong> nano filler CaCO3 <strong>in</strong> the SBR matrix was achieved by Brabender Plastograph.<br />

References<br />

1. Fu, X. and Qutubudd<strong>in</strong>, S., “Polymer-Clay Nanocomposites: Exfoliation <strong>of</strong> Organophilic<br />

Montmorillonite Nanolayers <strong>in</strong> Polystyrene,” Polymer, 42, 807-813, 2001.<br />

2. Messersmith, P.B. and Giannelis, E.P., “Synthesis and Characterization <strong>of</strong> Layer Silicate-<br />

Epoxy Nanocomposites,” Chem. Mater., 6, 1719-1725, 1996<br />

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Properties <strong>of</strong> Polyimide-clay Hybrid, J. Polym. Science.,31(10): 2493–2498.<br />

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Rubber-clay Nanocomposites, J. Applied Polymer Science., 78(11): 1879–1883.<br />

5. Mishra, S., Shimpi, N. G. (2005). Comparision <strong>of</strong> Nano CaCO3 and Flyash Filled with<br />

Styrene Butadiene Rubber on Mechanical and Thermal Properties, JSIR, Vol-64.<br />

6. Saujanya, C., Radhakrishnan, S. (1998). Structure Development <strong>in</strong> PP/CaSO4<br />

Composites: Part-I Preparation <strong>of</strong> Filler by an In –situ Technique, J Mater Sci, 33: 1062-<br />

1068.<br />

7. Mishra, S., Sonawane, S. H., S<strong>in</strong>gh, R. P., Bendale, A. and Patil, K. (2004). Effect <strong>of</strong><br />

Nano Mg (OH)2 on the Mechanical and Flame Retard<strong>in</strong>g Properties <strong>of</strong> PP Composites, J<br />

Appl Polym Sci, 94:116.<br />

8. Gleiter H., Nanostructure Mater 1991, 1, 1.<br />

9. Koch C C., Nanostructure Mater, 1991, 21:559.<br />

10. Mishra, S., Sonawane, S. H. and S<strong>in</strong>gh, R. P., (2005). Studies on Characterization <strong>of</strong><br />

Nano CaCO3 Prepared by In-situ Deposition Technique and Its Application <strong>in</strong> PP-nano<br />

CaCO3 Composites, J Polym. Sci Part B: Polym. Phys, 43:107.

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