Table 5 Colloid condensation time at different PH values.

From: Research and application of high gas coal seam air leakage control technology based on polymer material cross-linking mechanism

Number

Material proportion

PH

Colloid formation time (min)

1

2.5% PVA + 0.6% Borax

4

62

2

2.5% PVA + 0.6% Borax

5

48

3

2.5% PVA + 0.6% Borax

6

37

4

2.5% PVA + 0.6% Borax

7

34

5

2.5% PVA + 0.6% Borax

8

24

6

2.5% PVA + 0.6% Borax

9

18

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