Isocyanate Reduction by Epoxide Substitution of Alcohols for Polyurethane Bioelastomer Synthesis

Table 4

Tensile and thermal properties of bioelastomers from acid-catalyzed epoxides of Table 3. Bioelastomers were evaluated at 10%–30% by weight pMDI based on acid-treated ESBO.

Sample code	Description	Strength at break, MPa	Strain at Break, %	Young’s modulus, MPa	Tg (DSC), °C
10A	A + 10% pMDI	Material too soft			—
10B	B + 10% pMDI	Material too soft			—
10C	C + 10% pMDI	Material too soft			—
15A	A + 15% pMDI	Material too soft			−10.2
15B	B + 15% pMDI	0.29 ± 0.01	4.34 ± 2.96	0.22 ± 0.03	−13.8
15C	C + 15% pMDI	0.42 ± 0.14	5.10 ± 2.89	0.47 ± 0.34	−17.4
25A	A + 25% pMDI	0.94 ± 0.12	9.00 ± 1.54	0.46 ± 0.09	−11.5
25B	B + 25% pMDI	1.32 ± 0.14	5.93 ± 0.83	0.95 ± 0.07	−15.9
25C	C + 25% pMDI	1.47 ± 0.12	5.13 ± 0.48	2.04 ± 0.36	−18.4
30A	A + 30% pMDI	Material too brittle			—
30B	B + 30% pMDI	Material too brittle			—
30C	C + 30% pMDI	Material too brittle			—