AuthorGrigalovica, AgneseBartule, MadaraZicans, JanisMeri, Remo MerijsHeim, Hans-PeterBerger, Christian
Subject620 Engineering 660 Chemical engineering PolyoxymethyleneCopolymereGemischRheologische EigenschaftDynamisches Verhalten
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Relaxation properties of polyoxymethylene and ethylene–octene copolymer blend in solid and melt states
Rheological properties of polyoxymethylene (POM) and ethylene–octene copolymer (EOC) in solid and melt states were investigated. Blends were prepared with a twin screw extruder at broad component wt-to-wt ratios (10, 30, 50, 70, 90 wt% of EOC). The morphology as well as calorimetric, rheological, and elastic properties of the blends were studied. The investigation showed that POM/EOC blends were heterogeneous in nature and had a broad phase transition region between 30 and 70 wt% of POM. Because during processing droplet breakup is enhanced for EOC-rich systems, respective blends show “better” morphology with smaller particle sizes. It was, however, observed that rheological and dynamic characteristics (such as storage E¢ and loss E² modules as well as shear elastic G¢ and viscous G² modules) were highly influenced by intrinsic incompatibility of POM and EOC. Besides, also the crystallization specifics of the investigated blends influenced their E¢ and E².
CitationIn: Proceedings of the Estonian Academy of Sciences Volume 61 / Issue 3 (2012-08-30) , S. 200-206 ; EISSN 1736-7530
CollectionsPublikationen (Fachgebiet Kunststofftechnik)
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