In Reply to: Acrylic Terpolymer - Thickening Problems - Help! posted by Greg Keiser on 06/29/00 at 11:48 AM:
About you process: Do you try to increase the viscosity of 30 % ammonia solution by using acrylic polymer?
There is lot of possibilities and it is very difficult to say the right one. However I'll try:
1.Linearity or molecular weight of the polymer has changed. That means that the polymerisation process has changed. It is easy to find that out in laboratory by using the old product as a reference.
2. The monomer distribution has changed in the polymer. IR analysis could tell you that.
3. Ammonia quality or your process might have changed in terms of pH, metal ions....