Thermal Properties, Interactions, Morphologies, and Conductivity Behavior in Blends of Poly(vinylpyridine)s and Zinc Perchlorate

Abstract

We have investigated the physical properties and specific interaction of two regioisomeric poly(vinylpyridine)sspoly(2-vinylpyridine) (P2VP) and poly(4-vinylpyridine) (P4VP)sblended with zinc perchlorate. Analyses by differential scanning calorimetry indicate that the values of Tg of the poly-(vinylpyridine)s increase significantly upon blending with zinc perchlorate. The values of Tg of P2VP and P4VP increase by 119 and 154°C, respectively, relative to their corresponding pure polymers, upon blending with 40 and 30 wt %, respectively, zinc perchlorate. On the basis of the extended configuration entropy model equation, the interaction strength of the zinc salt/P4VP blend (3.60) is greater than that of the zinc salt/P2VP blend (3.55). The interaction between the polymer and the zinc ion was confirmed by infrared, X-ray photoelectron, and solid-state NMR spectroscopies, which suggest that the zinc cation coordinates to pyridine units in a metal-ligand bonding mode. In addition, the strength of the interaction between the polymer and the zinc ion is influenced by the different steric demands of the two polymer structures. A good correlation is found in the morphology of these polymer/zinc salt blends as determined by wide-angle X-ray diffraction and solid-state NMR T 1F H measurements.

Supramolecular Functionalities Influence the Thermal Properties, Interactions and Conductivity Behavior of Poly(ethylene glycol)/LiAsF6 Blends

“…Upon increasing the concentration of salt added to both U-PEG and U-PEG-U, the signals for their amorphous halos underwent obvious shifts to the left, indicating that the d-spacings for the lithium salt/U-PEG and U-PEG-U blends increased accordingly as a result of the coordination of Li + ions to the polymer chain through ion-dipole interactions, with the AsF 6 − anions weakly solvated and distributed among the polymer chains. These large solvated AsF 6 − anions led to chain expansion, forcing the polymer chains apart; a similar phenomenon had been observed for a LiClO 4 /PPO complex [33]. , representing free ions, shifted the higher wavenumber upon increasing the content of the lithium salt; a slight shoulder appeared at 717 cm −1 as a result of the formation of contact ion pairs, indicating that ionic aggregation occurred at relatively high lithium salt contents.…”

Crystallization behaviors of poly(vinylidene fluoride) and poly(methyl methacrylate)-block-poly(2-vinyl pyridine) block copolymer blends

“…The addition of P2VP yields greater hydrophilicity than PMMA for the same content in the blend. When the blends of PVDF and PMMA-b-P2VP diblock copolymer have been prepared as membrane with improved hydrophilic properties and P2VP exiting on the channel inner surface, salt ions, such as zinc or lithium ions, have weak interaction with P2VP for using in electrochemical applications [28,29]. …”

“…One block PMMA is compatible with PVDF, and another block P2VP is considerably hydrophilic [27]. Besides, P2VP as a polyelectrolyte has weak interaction with salt ions, such as zinc or lithium ions, and its mixtures with ions can be used for electrochemical applications [28,29]. The blends of PVDF and PMMA-b-P2VP diblock copolymer will have potential applications in membrane or polyelectrolyte gel with improved hydrophilic properties.…”

Functionalization of Poly(propylene) Fabric with 4‐Vinylpyridine, N,N‐Dimethylacrylamide and Styrene by γ‐Radiation‐Induced Grafting in an Aqueous Environment

“…In the case of PPF-g-VP (GW % 185%) sample, the characteristics absorption peaks exist at 1 597, 1 557, 1 069, and 821 cm À1 pyridine ring stretching vibration mode. [33] Lee and co-workers [34] reported that the characteristic modes at 1 597 and 1 557 cm À1 are due to quadrant stretching of the pyridine rings. The bands at 743 and 670, 743 and 670 cm À1 C-H attributed to the pyridine bending mode.…”