Hello Diane,
PMMA was used extensively in the papers written
during the '90's. In fact I used it in many of my early papers.
There was one paper I co-authored and I wrote MMA instead of PMMA and the
co-author kept changing it back to PMMA. I finally told him we were using
MMA not PMMA. PMMA is polymethly methacrylate and these are the protocols
that use the MMA beads that are stirred into the solution making the medium
honey consistancy. This is very messy but maybe the blocks polymerize
faster. I only used the beads when I worked in Atlanta for about 9
months. Anyway MMA and PMMA should not be used
interchangably.
Take care,
Cathy