2014 (3) 7

Nonisothermal crystallization kinetics of the systems based on polyethylene oxide and carbon nanotubes

E.A. Lysenkov1, V.V. Klepko2, V.M. Golovanets1

1Mykolayiv National University named after V.O. Sukhomlinskiy

24, Nikolska Str., Mykolayiv, 54030, Ukraine

2Institute of Macromolecular Chemistry of NAS of Ukraine

48, Kharkivske highway, Kyiv, 02160, Ukraine

Polym. J., 2014, 36, no. 3: 269-275.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

Nonisothermal crystallization  kinetics of the systems based on polyethylene oxide and carbon nanotubes is investigated using the method of differential scanning calorimetry. It is discovered that nanotubes substantially influence on basic parameters of polymer crystallizations, that is related to the percolation behavior of these systems. It is rotined that when the system achieve the percolation threshold (0,5 % of nanofiller), Avrami exponent, fractal dimension of growing crystals, activation energy show an extreme behavior. Such behavior is explained decision influence of nanotubes’ surface which under reaching the percolation threshold  form the ramified structure with the maximal surface of polymer–nanotubes interaction.  

Keywords: crystallization kinetics, nanocomposites, percolation behavior, carbon nanotubes, activation energy.