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Karlheinz Gamp, Yi Thomann, Christian Friedrich, André Hebel, Kirsten Markgraf, Hanno Hückstädt, Klaus Kurz and Rolf Mülhaupt Improving Melt Flow of Polyoxymethylene (“High-Speed POM”): Additive Design, Melt Rheology, and In Situ Composition Gradient Formation Macromolecular Materials and Engineering 299

Version of Record online: 10 JUN 2013 | DOI: 10.1002/mame.201200459

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Variation of isocyanurate substitution patterns and functionalities is the key to novel additives for “high-speed POM”. In injection molding only 3 wt% isocyanurate urethane (I3O) are sufficient for increasing the POM melt flow path by 60%. Such additives can reduce processing temperature by 40 K. Lubrication mechanisms and the role of in situ composition gradient formation, resulting from additive surface migration, are studied.

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