EPS	Expanded polystyrene
EPE	expanded polyethylene
EPU	Expanded Polyurethane
PLA	Poly(lactic acid)
MC	Moisture content
AC	Activated carbon
MWCNT	Multi-wall carbon nanotubes
EI	Expansion index
PTSA	p-toluenesulfonic acid
BA	Bottom ash
ADC	Azodicarbonamide
TPUR	Thermoplastic polyurethanes
CB	Carbon black
OPEX	Operating expense
CAPEX	Capital expense
PVOH	Polyvinyl alcohol
Sodium chloride	NaCl
Calcium chloride	CaCl2
BIH	Hydrocerol
MC	Moisture content
SS	Sodium silicate
PEGDA	Polyethylene glycol diacrylate
CS	Chitosan
Ti	Titanium
Al	Aluminum
BC	Boron carbide
PCL	Poly(caprolactone)
DCM	Dichloromethane
BPO	Benzoyl peroxide
PTFE	Polytetrafluoroethylene
NiCr	Nickel-chromium
SiC	Silicon carbide
RH	Relative humidity
EPDM	Ethylene-propylene-diene
PP	Polypropylene