Self-Healing Polyurethane-Based Nanocomposites Modified with Carbon Fibres and Carbon Nanotubes

Table 1

Materials used for the preparation of PU-based nanocomposite samples.

Name	Label	Agent	Manufacturer	Characteristics
PU-based matrix
Polytetrahydrofuran	PTHF	Polyol	Sigma-Aldrich, Cat. no 345296 Germany	Molar mass; 1000
Aliphatic isocyanate,	HDI derivative	Isocyanate	Desmodur® N 3300 (Bayer) Germany
1,4 Butanediol	BDO	Chain extender	Acros Belgium
Dibutyltin dilaurate	DBTDL	Catalyst	Sigma-Aldrich Germany	Organotin compound
Carbon fibrous components
Functionalized multi-walled carbon nanotubes	CNT-OH	PU nanometric modifier	Nanostructured & Amorphous Materials, Inc., USA; Cat. no 1249 YJF	Surface OH groups; 1,67-1,85 wt%; Length 0,5-2 μm; Outer diameter 10-20 nm; Inner diameter 5-10 nm
Carbon fibres	CF	PU modifier	Carbon Pipreg® Porcher Industries, France; Cat. no 3257-P54	PU-based sizing agent; Diameter ~7 μm; Density (g/cm^3): 1,5; Modulus (GPa): 235; Tensile strength (MPa): 4 400