Table 4.

Main values of Young’ modulus in GPa.

Sample	Before Aging			After Aging
	MD	PD	45	MD	PD	45
R	17.31 ± 0.20	14.36 ± 0.40	9.34 ± 0.65	18.43 ± 0.24	14.78 ± 0.45	10.39 ± 0.18
R/S15	16.95 ± 0.49	13.51 ± 0.27	8.64 ± 0.17	17.79 ± 0.09	14.33 ± 0.25	9.55 ± 0.35
R/S15/Q2	17.13 ± 0.46	14.01 ± 1.22	8.46 ± 0.20	17.86 ± 0.17	14.69 ± 1.00	9.94 ± 0.17