Hi all,

I am doing some experiments using different PDMS base and curing agent
ratio. In this regard I would like to state that as I am decreasing the
curing agent ratio, the PDMS is becoming softer (due to less hardner), but
I feel that it has not polymerised completely as compared to that of 10:1
ratio sample. Does decreasing the curing agent amount require a higher time
for polymerization or it takes the same time for any ratio. Moreover I find
my samples turning yellowish in color as the curing ratio is decreased.
Does this happen this way or their is something wrong? I shall be highly
obliged if anyone can help me out in this regard.

Thanks in advance.

Debashis Maji,