Abstract
AbstractA series of poly(methyl methacrylate)s with molecular weights in the range 3.0 × 104–1.03 × 106 have been prepared by anionic polymerization and their limiting viscosity numbers determined in a variety of solvents. It was found that whereas the higher‐molecular‐weight polymers behaved normally, the lower‐molecular‐weight polymers showed anomalous behavior. First, the limiting viscosity numbers of the lower‐molecular‐weight polymers were much higher than expected, and, second, their number‐average molecular weights as measured by gel permeation chromatography were considerably smaller than those determined by membrane osmometry.
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