Effect on Mechanical and Thermal Properties of Random Copolymer Polypropylene/Microcrystalline Cellulose Composites Using T-ZnOw as an Additive

Table 2

Density and void content of composites.

Sample	Weight Fraction	Experimental density	Theoretical density	Void content
	(%)	(g·cm^−3)	(g·cm^−3)	(%)
MCC/PP-g-MA/rPP	30:5:65	0.95	1.01	5.67
	40:5:55	0.97	1.03	5.83
	50:5:45	1.03	1.11	7.21
	60:5:35	1.06	1.15	7.83
	70:5:25	1.07	1.17	8.55
T-ZnOw/MCC/PP-g-MA/rPP	3:58:5:35	0.99	1.22	18.85
	5:57:5:35	0.93	1.15	19.13
	7:55:5:35	0.87	1.12	22.32
	10:53:5:35	0.81	1.11	27.03

Specific gravity of the matrix = 0.900 g·cm⁻³.
Specific gravity of the MCC = 1.244 g·cm⁻³.
Specific gravity of the T-ZnOw = 0.200 g·cm⁻³.