Nondestructive testing of defects in adhesive joints

Drawing the fiber at 100 0 C, which is near to the crystallization temperature result in better orientation
of MWNT which manifests in an increase in overall mechanical properties than fiber drawn at 80 0 C.
Drawing the fiber at 120 0 C, which is above the crystallization temperature results in even better
orientation of MWNT than drawing at 100 0 C which manifests in an increase in overall mechanical
properties.
However, PP/MWNT composite fibers do not exhibit any linear increase in mechanical properties
with increasing MWNT concentration. The reason is due to inadequate interfacial interaction in
between the PP chain and MWNT; formation of MWNT aggregates in PP matrix and due to MWNT
slippage which is detrimental to the mechanical properties of composites [12, 13].
4. Conclusion
It was found that drawing speed and temperature had a profound effect on the mechanical properties
of composite fiber. The favorable condition of drawing the composite fiber was drawing at higher
temperature and at low drawing speed.
5. Acknowlegements
We would like to acknowledge Microcompounder Central facility, CRNTS at IIT Bombay. We would
also like to thank DMSRDE, Kanpur for the financial assistance for the project (TR/0569/CARS-33).
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