Effect of the Addition of Oil Palm Mesocarp Fibers on the Physical and Mechanical Properties of a Polyester Matrix Composite

Table 3

Densities and porosity rate of the different samples.

Densities and porosity rate	UP-100	UP-OPMF-2.5	UP-OPMF-5	UP-OPMF-7.5	UP-OPMF-10	UP-OPMF-12.5	UP-OPMF-15
(kg/m^3)	1192.5	1182.7	1176.6	1170.9	1165.4	1157.8	1153.1
SD	7.2	10.9	14.7	18.3	19.4	27.9	14.8
(kg/m^3)	1219.6	1216.2	1214.2	1209.6	1203.1	1198.4	1194.4
SD	8.9	9.3	12.4	8.7	13.3	6.4	5.0
(kg/m^3)	1219.6	1219.2	1218.9	1218.6	1218.2	1217.9	1217.5
Porosity rate	2.216	2.750	3.099	3.131	3.197	3.388	3.462
SD	0.81	0.85	0.84	0.48	0.69	0.23	0.34

: apparent density; : true density; : theoretical density.