Table 2.

Surface properties of the pristine and laser-treated films prepared from PHAs with different composition.

PHA Composition, mol.%	Water Contact Angle,°	Surface Energy, mN/m	Dispersion Component, mN/m	Polar Component, mN/m
Pristine films
P(3HB) = 100.0	92.1 ± 6.33	30.8 ± 0.53	28.6 ± 0.31	2.3 ± 0.21
P(3HB-co-3HV) = 72.8/27.2	69.4 ± 9.4	50.8 ± 2.64	43.7 ± 1.46	7.1 ± 1.18
P(3HB-co-4HB) = 64.5/35.5	81.7 ± 3.24	41.4 ± 0.89	37.8 ± 0.7	3.7 ± 0.19
P(3HB-co-3HHx) = 620/38.0	56.3 ± 6.16	57.1 ± 2.89	43.5 ± 2.03	13.6 ± 0.85
Continuous wave mode
P(3HB) = 100.0	80.5 ± 2.5	40.8 ± 0.52	39.9 ± 0.31	4.9 ± 0.20
P(3HB-co-3HV) = 72.8/27.2	76.2 ± 2.6	46.0 ± 3.22	41.1 ± 2.64	4.9 ± 0.58
P(3HB-co-4HB) = 64.5/35.5	79.9 ± 4.24	42.0 ± 1.15	37.7 ± 0.89	4.3 ± 0.26
P(3HB-co-3HHx) = 620/38.0	70.0 ± 5.25	45.5 ± 1.29	36.8 ± 0.86	8.7 ± 0.42
Quasi-pulsed mode
P(3HB) = 100.0	67.7 ± 3.30	48.6 ± 1.14	39.7 ± 0.58	9.0 ± 0.56
P(3HB-co-3HV) = 72.8/27.2	84.6 ± 3.75	41.7 ± 1.49	39.2 ± 1.12	2.5 ± 0.37
P(3HB-co-4HB) = 64.5/35.5	68.2 ± 2.36	47.5 ± 1.13	38.3 ± 0.69	9.1 ± 0.44
P(3HB-co-3HHx) = 620/38.0	76.4 ± 3.29	44.3 ± 2.28	39.0 ± 1.72	5.3 ± 0.57