A group of 99 materials lias been evaluated as plasticizers in a commercial vinyl chloride-acetate resin. A range of three concentrations of plasticizer was used and the same methods of evaluation were employed as in a previous paper (4). Plasticizing efficiency is shown by elongation at 1000 pounds per square inch at 10°, 25°, and 40°C. Data are also given at these three plasticizer concentrations for volatile loss, oil extraction, water extrac-
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