CF	Carbon fibre
DSC	Differential scanning calorimetry
E′	Storage modulus
G	Graphene
GPEI	Graphene modified with PEI (55/45 PEI/graphene weight ratio)
GSPEEK	Graphene modified with SPEEK (55/45 SPEEK/graphene weight ratio)
PEEK	Poly(ether ether ketone)
PEEK/CF	Laminate alternating PEEK and CF
PEEK-GPEI	PEEK nanocomposite including 3 wt.% of graphene and 3 wt.% of PEI
PEEK-GPEI/CF	Laminate alternating PEEK-GPEI and CF
PEEK-GSPEEK	PEEK nanocomposite including 5 wt.% graphene and 5 wt.% SPEEK
PEEK-GSPEEK/CF	Laminate alternating PEEK-GSPEEK and CF
PEI	Polyetherimide
SPEEK	Sulfonated PEEK
σ	Electrical conductivity
h	Indenter displacement
Ti	Degradation temperature at 5% weight loss
Tm	Melting temperature
TGA	Thermogravimetric analysis
Xc	Degree of crystallinity