And I hope everyone understands that it lasts longer in the refrigerator because of the low humidity, not the temperature. Room temperature + silica gel is just as good.
I didn't realize it was only humidity. The relative humidity in my refrigerator is quite a bit higher than room air. Absolute humidity is approximately the the same as as room air most of the time. That is there is no condensation inside the refrigerator except on very humid Summer days.* Do you have a reference to support your view?
On the other hand, the standard polymerization reaction is base catalyzed as mentioned before (attachment 1). One might expect that reaction to be affected by temperature. In addition, the ionization of water is strongly affected by temperature:
T (°C) Kw (mol2 dm-6) pH pOH
0 0.114 x 10-14 7.47 7.47
10 0.293 x 10-14 7.27 7.27
20 0.681 x 10-14 7.08 7.08
25 1.008 x 10-14 7.00 7.00
30 1.471 x 10-14 6.92
Source: https://chem.libretexts.org
Thus, at 25°C the concentration of OH- (a base) is almost
10X3X the concentration at 0°C. Since CA is in great excess, one would expect that 10-fold decrease in the other reactant to have a significant effect.
*EDIT: Assuming you mean open in the refrigerator. I keep my CA sealed in canning jars whether in the refrigerator or freezer. The absolute humidity is the same as when put in the jar, except for any decrease related to initiating the polymerization.
EDIT2: Ionization constant is the product of [H+] and [OH-]. Thus it is approximately only 3X not 10X. Fixed in text. Sloppy on a Sunday afternoon. It now agrees with the pOH.