Table 3.

Mechanical properties of the initial film (F) and resulting porous membranes (M1–M5).

Sample	F		M1		M2		M3		M4		M5
Direction	TD	LD	TD	LD	TD	LD	TD	LD	TD	LD	TD	LD
σ, MPa	27	33.7	16.6	19.5	11.4	14	8.2	8.8	7.4	7.8	3.3	3.1
ε, %	200	323	53	255	32	243	95	107	80	86	67	74
σtrue, MPa	81.2	143	28.9	78.7	20.8	66.3	29.6	33.5	29.8	32.4	15.6	15.4
E, MPa	303	275	287	240	160	175	109	125	92	98	37	33