Hybrid Biocomposites Based on Used Coffee Grounds and Epoxy Resin: Mechanical Properties and Fire Resistance

Table 1

Properties of epoxy Epikote 240 resin.

Properties	Test method	Unit	Value
Epoxy group content	SMS 2026	mmol/kg	5100–5400
Epoxy molar mass		g	185–196
Viscosity at 25°C	ASTM D445	Pa.s	0.7–1.1
Colour	ASTM D1209	Pt-Co	200 max
Density at 25°C	ASTM D4052	kg/L	1.12

No. of grams of resin containing 1 g equivalent of epoxide (weight per equivalent, WPE, is an alternative term).1 Pa.s = 10 poise.