Expanding the range of polyhydroxyalkanoates synthesized by methanotrophic bacteria through the utilization of omega-hydroxyalkanoate co-substrates

AMB Express

Table 2 Physical properties of the methanotroph produced PHA polymers

PHA products	Molecular weights		Thermal properties			Mechanical properties
PHA products	M_n	M_w/M_n	T_m (°C)	ΔH_m (J/g)	T_g (°C)	E (GPa)	σ_t (MPa)	ε_b (%)
P3HB	1.48 E+06	1.82	178	83	3	3.0	43.2	5.2
P(3HB-co-24 mol% 3HV)	1.32 E+06	2.24	147	45	−1	1.0	22.0	50.5
P(3HB-co-3.0 mol% 4HB)	1.33 E+06	2.12	148	65	−2	1.2	35.6	176
P(3HB-co-9.5 mol% 4HB)	1.22 E+06	2.01	135	47	−5	0.8	31.2	284
P(3HB-co-3.6 mol% 5HV-co-1.4 mol% 3HV)	1.26 E+06	2.17	144	44	−2	0.8	29.9	106
P(3HB-co-1.4 mol% 6HHx-co-1.0 mol% 4HB)	1.27 E+06	2.11	150	40	−1	0.7	27.6	134
Commercial P3HB	7.38 E+05	2.02
Commercial PHBV	4.48 E+05	2.18

M _n number average molecular weight, M _w weight average molecular weight, T _m melting temperature, ΔH _m apparent heat of fusion, T _g glass transition temperature, E Young’s modulus, σ _t tensile strength, ε _b elongation at break