Abstract
Abstract Poor prbcessability has long been recognized as one of the shortcomings of GR-S. Since the problem is of major importance, this deficiency has been the subject of a number of investigations. Freshly milled samples of GR-S shrink rapidly and become very rough. Samples extruded through a die swell excessively and give irregular and broken edges. These faults have, in many instances, necessitated excessive loading with compounding materials to permit satisfactory calendering and extrusion. Sacrifices in quality have often been tolerated to obtain suitable processing. The present paper describes a new type of GR-S in which vastly improved processing properties have been imparted to the polymer during the copolymerization reaction.
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