Table 1. Gel-Breaking Results of P3A and Guar Gum Solutions at 100 °C.

	0.1 wt % APS			0.2 wt % APS
Cpolymer (wt %)	ηf (mPa·s)	residues (mg/L)	tb (min)	ηf (mPa·s)	residues (mg/L)	tb (min)
P3A
0.8	2.34	none	90	2.43	none	60
1.0	2.37	none	90	3.82	none	60
1.2	2.71	none	90	2.83	none	60
0.8a	2.43	none	90
guar gum
0.8	1.82	1020	100	1.68	813	100
1.0	2.56	1170	100	2.24	865	100
1.2	1.97	1540	100	1.81	928	100
0.8a	4.78	480	100

^aIn a pure water system.