Ionomeric blends of poly(ethylene oxide) with poly(styrene-co-maleic anhydride) ionomer: Miscibility, crystallization, and melting behavior

✍ Scribed by Hasan A. Al-Salah

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 150 KB
• Volume: 77
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000705)77:1<1::aid-app1>3.0.co;2-y

✦ Synopsis

The miscibility and crystallization behavior of poly(ethylene oxide) (PEO) and poly(styrene-co-maleic anhydride) ionomer (SMAI) blends were studied by the dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). This study has demonstrated that the presence of ion-dipole interactions enhances the miscibility of otherwise immiscible polymers in the PEO and high molecular weight poly(styrene-co-maleic anhydride) (SMA). The effect of ion-dipole interactions on enhancing miscibility is confirmed by the presence of a single glass transition temperature (T g ) and a depression of the equilibrium melting temperature of the PEO component. The equilibrium melting temperature of PEO in the blends are obtained using Hoffman-Weeks plots. The interaction energy density, ␤, is calculated from these data using the Nishi-Wang equation. The results suggest that PEO and SMAI blends are thermodynamically miscible in the melt.