Physical Properties of Soy-Phosphate Polyol-Based Rigid Polyurethane Foams

Table 6

Calculation of isocyanate density.

SPP	Isocyanate index	Foam density (kg/m^3)	Theoretical isocyanate amount (g)	Actual isocyanate amount (g)	Isocyanate mass fraction	Isocyanate density (kg/m^3) = Foam density × isocyanate mass fraction	Compressive strength (kPa)
0	110	48.29	176.62	176.62	1	48.29	461.99
	100	44.25	160.57	160.57	1	44.25	424.79
	90	41.97	144.50	144.50	1	41.97	376.59
	80	38.5	128.45	128.45	1	38.50	347.71
	70	35.77	112.40	112.40	1	35.77	324.48
20%	110	45.62	176.62	163.73	0.93	42.29	379.04
	100	43.40	160.57	148.85	0.93	40.23	346.97
	90	39.65	144.50	133.97	0.93	36.76	313.95
	80	36.88	128.45	119.08	0.93	34.19	253.47
	70	36.39	112.40	104.20	0.93	33.73	197.40
50%	110	45.40	176.62	144.40	0.82	37.12	264.28
	100	41.87	160.57	131.28	0.82	34.23	232.98
	90	39.36	144.50	118.15	0.82	32.18	167.07
	80	36.98	128.45	105.02	0.82	30.23	147.29
	70	47.18	112.40	91.88	0.82	38.56	84.15