Preparation and conductive properties of polycaprolactone‐grafted carbon black nanocomposites

Abstract

Polycaprolactone-grafted carbon black (CBg-PCL) nanocomposites were prepared by surface-initiated ring-opening polymerization of e-caprolactone on the surface of CB. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), atomic force microscope (AFM), X-ray diffraction (XRD), and polarizing optical microscope (POM) method were employed to characterize the resultant CB-g-PCL. The effect of temperature on resistivity of polycaprolactone-grafted CB (CB-g-PCL) nanocomposites was investigated and compared with that of mixture of CB and PCL. It was found that CB-g-PCL nanocomposites exhibited positive temperature coefficient (PTC) phenomena between 48 and 51 C, and negative temperature coefficient (NTC) phenomena and between 51 and 54 C. The prepared CB-g-PCL nanocomposites have the potential to be temperature-dependent switch materials.

A novel polycaprolactone‐grafted‐carbon black nanocomposite‐based sensor for detecting solvent vapors

“…Based on previous research on conductive properties of polymer‐ g ‐CB19, 20 and gas sensing properties of polymer‐grafted‐carbon nanomaterials,9, 21 we proposed the response of resistance to vapor possibly resulted from the gradual phase transfer of the polymer crystal induced by vapor swelling. The vapor sensing mechanism of sensor containing CB‐ g ‐PCL was presented as follow.…”

Preparation and characterization of crosslinked poly(ε-caprolactone)/polyhedral oligomeric silsesquioxane nanocomposites by electron beam irradiation

“…However, PCL has been limited to diverse applications because of its low processability and mechanical properties [6,7]. To overcome these drawbacks, PCL nanocomposites have been widely investigated by incorporating various nanofillers such as carbon nanotubes, nanoparticles, and nanoclay [8][9][10][11][12].…”