Non-isothermal crystallization kinetics model of PBT MWCNTs nanocomposites

Abstract EN

The non-is othermal crystallization kinetics and crystalline properties of nanocomposites poly butyleneterephthalate, [PBT] /multiwalled-carbon nanotubes (MWCNTs) were tested by differential scanning calorimetry (DSC).

PBT / (MWCNTs) nanocomposite was prepared by ultrasonicated of MWCNTs (0.5, 1, 2, 4 wt %) in dichloromethane (DCM) and after that the powdered PBT polymer was added to the MWCNTs solution.

The non-isothermal crystallization results show that increasing the MWCNTs contents, decreased the melting temperature (Tm) of PBT / (MWCNTs) nanocomposite as compared with pure PBT, while resulting in improving the degree of crystallinity.

These results indicated that a little amount of MWCNTs can be evident strong nucleating agent in PBT nanocomposites.

Avrami kinetics model results given a good agreement with the frequent investigation.

The Kissinger method shows the MWCNTs had a well nucleation effect on the crystallization of PBT, and the enhancement activation energy (Ea) with increased the MWCNTs in PBT / (MWCNTs) nanocomposite.