Table 2 Thermal properties of PHAs using short and medium chain carboxylic acids as the only carbon sources.

Carbon source	PHA composition	Cooling			2nd Heating						Thermogravimetric analysis
Carbon source	PHA composition	T_g [°C]	T_c [°C]	ΔH_c [J/g]	T_g [°C]	T_cc [°C]	ΔH_cc [J/g]	T_m [°C]	ΔH_m [J/g]	X_c [%]	T_5% [°C]	T_50% [°C]	T_95% [°C]	T_max [°C]
Acetic acid	P (99.2% HB-co-0.8% HV)	− 6.6	52.9	31.2	− 0.8	35.5	47.2	165.0	78.8	29.0	232.4	258.4	296.3	262.0
Propionic acid	P (93.6% HB-co-6.4% HV)	− 3.9	nd	nd	0.8	38.0	60.2	158.9	62.5	2.1	228.7	252.6	366.6	253.0
Butyric acid	P (99.4% HB-co-0.6% HV)	− 5.6	46.6	9.0	1.9	34.2	68.9	165.8	72.1	2.9	215.9	243.2	452.3	240.2
Valeric acid	P (17.5% HB-co-82.5% HV)	− 3.1	48.9 (32.2)^a	32.7	2.2	33.4	17.0	168.1 (53.6)^a	72.8 (6.3)^a	51.2	184.0	248.6	439.5	253.9
Caproic acid	P (98.8% HB-co-1.2% HV)	− 6.3	nd	nd	− 1.4	38.6	59.3	155.4	60.4	1.0	218.9	262.5	406.4	262.9
5% CAs—rich stream	P (98.5% HB-co-1.5% HV)	nd	57.2	32.7	1.5	39.7 (89.6)	31.4	165.4 (152.3)^a	71.4	36.8	238.0	257.4	339.4	259.1
10% CAs—rich stream	P (98.8% HB-co-1.2% HV)	nd	65.4	44.5	2.0	38.2 (90.4)^b	20.1	166.0 (155.5)^a	66.9	42.9	234.5	251.9	527.4	253.5
15% CAs—rich stream	P (98.3% HB-co-1.7% HV)	nd	59.2	43.8	2.5	38.1 (85.4)^b	24.6	165.4 (155.0)^a	79.2	50.2	232.2	251.4	266.5	253.8
20% CAs—rich stream	P (98.5% HB-co-1.5% HV)	nd	59.2	51.9	2.3	38.5 (86.1)^b	17.5	162.0 (150.3)^a	74.9	52.7	231.2	250.2	397.2	251.9
25% CAs—rich stream	P (98.4% HB-co-1.6% HV)	nd	65.4	54.1	1.9	41.8 (86.5)^b	21.9	163.4 (152.9)^a	75.3	49.0	230.9	252.6	335.1	255.0
30% CAs—rich stream	P (98.1% HB-co-1.9% HV)	nd	61.1	28.9	1.0	45.0 (86.2)^b	38.6	161.4 (149.6)^a	65.9	25.0	221.9	247.4	409.4	247.3

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