Table 2.

BOD-biodegradabilities for 28 days and X-ray crystallinities of PHA films [74,77].

Sample	Type of film	Crystallinity,a %	BOD-Biodegradability, %
P(3HB)	Solvent-cast	60 ± 5	75 ± 8
P(3HB-co-4mol%-3HV)		57 ± 5	77
P(3HB-co-12mol%-3HV)		50 ± 5	75
P(3HB-co-14mol%-3HV)		54 ± 5	76 ± 3
P(3HB-co-21mol%-3HV)		59 ± 5	74 ± 2
P(3HB-co-80mol%-3HV)		52 ± 5	9 ± 2
P(3HB-co-5mol%-4HB)		50 ± 5	80 ± 2
P(3HB-co-20mol%-4HB)		38 ± 5	84 ± 4
P(3HB-co-56mol%-4HB)		10 ± 5	63 ± 1
P(4HB)		34 ± 5	82 ± 2
P(3HB-co-15mol%-3HP)		40 ± 5	70 ± 2
P(3HB-co-36mol%-3HP)		19 ± 5	85 ± 5
P(3HP)		37 ± 5	4 ± 4
UHMW-P(3HB)		65 ± 5	78
UHMW-P(3HB)	Stretched	80 ± 5	78
UHMW-P(3HB)	Stretched-annealed	85	78

^a Determined by wide-angle X-ray diffraction.