QUALITY CONTROL SCIENTISTS, PLANT processing engineers and polymer formulation scientists are the most likely users of a new ASTM International standard, D 7210, Practice for Extraction of Additives in Polyolefin Plastics. The standard was developed by Subcommittee D20.70 on Analytical Methods, which is under the jurisdiction of ASTM International Committee D20 on Plastics. Practice D 7210 covers a variety of extraction techniques for antioxidant and slip additives used in polyolefins. "Polymer formulation is both art and science," says Richard Carlson, staff chemist, Dionex. "In addition to monomers that lead to the macro-molecules known as polymers, hundreds of compounds have been produced that, when properly formulated and combined with a polymer, produce different properties."
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