Table 3. Mechanical properties parameters of PP and its flame-retardant composites.

Sample	Tensile strength [MPa]	Elastic modulus [MPa]	Elongation at break [%]	Impact strength [kJ m−2]
PP	24.1 ± 2.4	689 ± 42	51 ± 3	3.3 ± 0.6
P1	22.0 ± 2.4	643 ± 201	48 ± 3	3.2 ± 0.2
P2	21.8 ± 1.6	527 ± 131	43 ± 9	2.9 ± 0.4
P3	21.1 ± 1.4	723 ± 178	35 ± 7	3.4 ± 0.1
P4	22.5 ± 1.2	544 ± 40	48 ± 10	3.6 ± 0.3
P5	22.7 ± 1.5	558 ± 56	32 ± 7	3.8 ± 0.1
P6	22.7 ± 1.1	702 ± 237	33 ± 10	3.9 ± 0.2
P7	21.9 ± 1.3	651 ± 175	29 ± 6	3.8 ± 0.5