Abstract
Relationships have been established between process variables and the concentration of residual monomer in an autopolymerizing dental acrylic resin. It has been shown that long-lived polymer radicals are present in greater concentration after an initial cure at 22° than after cure at 55°. Assay of monomer concentrations by infrared spectroscopy showed residual monomer to be reduced by higher powder/liquid ratios, low temperature of initial cure, storage at elevated temperature and the exclusion of air (oxygen).
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