The Modification of Polyurethane Foams Using New Boroorganic Polyols (II) Polyurethane Foams from Boron-Modified Hydroxypropyl Urea Derivatives

Table 8

Compressive strength of the obtained polyurethane foams.

Foam type	Compressive strength; 𝜎𝑀 (MPa)	Compressive strength after; annealing at 150°C
		𝜎𝑀 (MPa)	Growth (%)
FA1	0.10 ± 0.004	0.34 ± 0.014	340
FA2	0.22 ± 0.007	0.36 ± 0.012	164
FA3	0.18 ± 0.007	—	—
FB1	0.54 ± 0.022	0.92 ± 0.016	70
FB2	0.31 ± 0.019	0.41 ± 0.013	132
FB3	0.28 ± 0.012	0.32 ± 0.007	114
FC1	0.04 ± 0.002	—	—
FC2	0.04 ± 0.002	—	—
FC3	0.02 ± 0.001	—	—