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decreased slightly but increased gradually with increasing MWNT
content. Figure 4b shows the crystallization behavior of the neat PBS
and its composites. The neat PBS was crystallized at 89.55 o C, and
the addition of MWNTs into the PBS matrix led to a shift of the Tc of the
nanocomposites to around 87 o C. This behavior indicates that the
MWNTs do not act as the efficient nucleating agent but impede the
crystallization process of the nanocomposites in all samples.
Consequently, lower temperature was needed to crystallize, as
indicated by the cooling scans. It is shown that the PBS
nanocomposite with 2 wt% MWNTs loading had a higher crystallization
temperature than the other samples.
3. 4. Mechanical testing
The tensile strength and elongation at break curves for the neat PBS
and its composites with different MWNT loadings are shown in Figure
5. The three preparation methods were also compared. It was found
that the nanocomposites prepared by the SOAM method exhibited a
better tensile property than those prepared by solution blending and
melt mixing, respectively. In this study, the ranking of high tensile
mechanical property of the MWNT-reinforced nanocomposites is the
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