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Article: Styrene Grafting Onto a Polyolefin in an Internal Mixer and a Twin-Screw Extruder: Experiment and Kinetic Model.
- Article from:
- Polymer Engineering and Science
- Article date:
- July 1, 2001
- Author:
CopyrightCOPYRIGHT 2001 Society of Plastics Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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There has been relatively little effort to quantitatively understand graft copolymerization in either batch mixers or twin-screw extruders. Most efforts have concentrated on grafting maleic anhydride, which does not homopolymerize. In this paper we consider grafting with styrene, which may homopolymerize as well as graft. The influence of residence time on degree of grafting in an internal mixer and a twin-screw extruder were studied by measuring reaction yields with respect to reaction time in a mixer and along the screw axis in a twin-screw extruder. The degree of grafting increased with initial monomer and peroxide concentration. Grafting reactions with three different ...