Influence of Processing Conditions on the Thermal Stability and Mechanical Properties of PP/Silica-Lignin Composites

Table 4

Comparison of the thermal decomposition temperatures of PP/silica-lignin composites under different extrusion conditions char wt.% formed during the test.

Sample	Screw speed	(°C)	(°C)	(°C)	Char (wt.%)
PP	—	397	453	445	0.30
PP/lignin	100 rpm	387	448	454	4.19
PP/SiO2-lignin (1 : 1)		415	450	455	5.80
PP/SiO2-lignin (2 : 1)		398	445	447	7.00
PP/SiO2-lignin (5 : 1)		423	456	460	6.17
PP/lignin	400 rpm	377	440	446	3.17
PP/SiO2-lignin (1 : 1)		415	453	457	6.08
PP/SiO2-lignin (2 : 1)		420	452	454	3.61
PP/SiO2-lignin (5 : 1)		423	454	456	3.77