Table 7. The Residue weight Precents of the PPOA Modified and Unmodified PUs

PU species(H12MDI base)	Residue weight percent
	200°C	500°C	600°C	700°C
PU-1H-0 / PU-1H-5	99.5 / 96.5	30.4 / 35.6	1.8 / 22.5	0.0 / 17.5
PU-2H-0 / PU-2H-4	99.4 / 97.8	19.4 / 27.1	0.8 / 20.7	0.0 / 10.6
PU-3H-0 / PU-3H-3	99.3 / 98.2	16.9 / 21.5	0.8 / 13.1	0.0 / 5.6
PU-4H-0 / PU-4H-2	99.2 / 99.1	11.7 / 21.0	0.7 / 11.4	0.0 / 4.0
PU-5H-0 / PU-5H-1	98.7 / 99.2	9.5 / 17.9	0.2 / 8.0	0.0 / 1.5