Dynamic Melt Rheological Properties of Ionomers Based on Poly(Ethylene-co-Acrylic Acid) and Poly(Ethylene-co-Methacrylic Acid)
Titel:
Dynamic Melt Rheological Properties of Ionomers Based on Poly(Ethylene-co-Acrylic Acid) and Poly(Ethylene-co-Methacrylic Acid)
Auteur:
Kurian, Thomas Nishio, Mihoko Nishioka, Akihiro Takahashi, Tatsuhiro Koyama, Kiyohito
Verschenen in:
International journal of polymeric materials
Paginering:
Jaargang 56 (2007) nr. 2 pagina's 135-145
Jaar:
2007-02-01
Inhoud:
The high temperature stability, and the dynamic melt rheological properties of poly(ethylene-co-acrylic acid) (EAA), zinc salt of EAA, and sodium salt of EAA were evaluated in the molten state over broad ranges of shear rates and temperatures using ARES (Rheometrics). The master curves of G' and G'' as a function of angular frequency (ω) were constructed for each material. The influence of ionic groups on the storage modulus (G'), loss modulus (G''), complex viscosity (η*), and flow activation energy (Ea) were analyzed. The results of EAA based ionomers are discussed with those of the ionomers based on poly(ethylene-co-methacrylic acid) (EMAA). The linear visco-elastic spectra, and flow activation energies of the two series of ionomers show differences.