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Relaxation properties of polyoxymethylene and ethylene–octene copolymer blend in solid and melt states

Grigalovica, Agnese
Bartule, Madara
Zicans, Janis
Meri, Remo Merijs
Heim, Hans-Peter
Berger, Christian

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.

Citation
In: Proceedings of the Estonian Academy of Sciences Volume 61 / Issue 3 (2012-08-30) , S. 200-206; EISSN 1736-7530
Collections
@article{doi:10.17170/kobra-202101182988,
  author    ={Grigalovica, Agnese and Bartule, Madara and Zicans, Janis and Meri, Remo Merijs and Heim, Hans-Peter and Berger, Christian},
  title    ={Relaxation properties of polyoxymethylene and ethylene–octene copolymer blend in solid and melt states},
  keywords ={620 and 660 and Polyoxymethylene and Copolymere and Gemisch and Rheologische Eigenschaft and Dynamisches Verhalten},
  copyright  ={http://creativecommons.org/licenses/by-nc/4.0/},
  language ={en},
  journal  ={Proceedings of the Estonian Academy of Sciences},
  year   ={2012-08-30}
}