Table 2: The stability of the polymer solution measure results.

Polymer Viscosity (mPa┬Ěs) Retention rate (%)
0 12h 24h 36h 48h 60h
APP5 36.1 18.2 9.3 6.5 5.2 5.1 14.13
KYPAM 17.4 6.8 4.83 4.3 3.87 3.45 19.83
HDSJ 17.3 5.4 2.3 1.75 1.56 1.45 8.38