Relaxation Properties of Polyoxymethylene and Ethylene–Octene Copolymer Blend in Solid and Melt States
Proceedings of the Estonian Academy of Sciences 2012
Agnese Ābele, Madara Bārtule, Jānis Zicāns, Remo Merijs-Meri, Hans - Peter Heim, Christian Berger

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 E′′ modules as well as shear elastic G′ and viscous G′′ modules) were highly influenced by intrinsic incompatibility of POM and EOC. Besides, also the crystallization specifics of the investigated blends influenced their E′ and E′′.


Atslēgas vārdi
polyoxymethylene, ethylene–octene copolymer, blends, rheological properties, dynamic properties
DOI
10.3176/proc.2012.3.09
Hipersaite
http://www.eap.ee/20959/

Grigaloviča, A., Bārtule, M., Zicāns, J., Merijs-Meri, R., Heim, H., Berger, C. Relaxation Properties of Polyoxymethylene and Ethylene–Octene Copolymer Blend in Solid and Melt States. Proceedings of the Estonian Academy of Sciences, 2012, Vol.31, Iss.3, 200.-206.lpp. e-ISSN 1736-7530. ISSN 1736-6046. Pieejams: doi:10.3176/proc.2012.3.09

Publikācijas valoda
English (en)
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