Tensile properties of the block polyester elastomers TBPE-6 to -9^a.

Sample	ε b b (%)	σ b c (MPa)	E y d (MPa)	G′e (MPa)	M e f (kg mol−1)
TBPE-6	1097 ± 37	6.5 ± 0.2	5.0 ± 0.7	2.4	2.9
TBPE-7	1437 ± 30	5.6 ± 0.3	3.6 ± 0.5	1.1	5.5
TBPE-8	1593 ± 41	4.0 ± 0.2	2.4 ± 0.4	0.5	9.0
TBPE-9	1883 ± 20	2.0 ± 0.2	1.4 ± 0.3	0.4	9.1

^aSamples were tested at 10 mm min⁻¹ extension rate, GL = 10 mm, width measured as an average of 3; error represents standard deviation of 10 specimens.

^bElongation at break.

^cTensile strength.

^dYoung's modulus measured within 0.025–0.25% strain using an external camera.

^eShear storage modulus at 25 °C calculated from the plateau storage modulus (E′), as illustrated in Fig. 1B and applying E′ = 2G′(1 + ν) where Poisson's ratio, ν = 0.5 which is typical of elastomers.⁸³

^fCalculated using the Guth–Smallwood equation at 25 °C: M_e = ρRT(1 + 2.5f_hard + 14.1f_hard²)/G′ using ρ_PDL = 0.974 g cm⁻³.²¹