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Effects of potassium iodide (KI) on crystallinity, thermal stability, and electrical properties of polymer blend electrolytes (PVC/PEO:KI)

“…Compared with polyimides and celluloses, PVC is relatively cheap and ideal for the formation of PVC/PEO blends. It has been demonstrated that the addition of PVC into PEO improves the mechanical property of PEO membranes [20], and suppresses the crystallization of PEO [21,22]. These approaches include synthesizing new polymers [23], cross linking two polymers [24], blending of two polymers [25], adding plasticizers to polymer electrolytes [26], adding inorganic inert fillers [27] to make composite polymer electrolytes (CPEs).…”

PEO/CHCl3. Crystallinity of the Polymer and Vapor Pressure of the Solvent. Equilibrium and Nonequilibrium Phenomena

“…Furthermore such systems offer an opportunity to learn more about the occurrence of nonequilibrium phenomena in mixtures containing crystallizable components. The freezing in of intermediate states during the 16.04.03 approach of equilibria is well documented for polymer blends of semi-crystalline and amorphous components in general [1][2][3][4][5][6][7][8][9][10][11][12][13] and with PEO as one component in particular [14][15][16][17][18][19] . Analogous investigations for the considerably less viscous solutions of such polymers (which should therefore be less prone to non-equilibria phenomena) are to our knowledge lacking.…”

Miscibility of Poly(Vinyl Chloride) with Poly(Ethylene Oxide) of Different Molecular Weights

“…7 Miscibility, mechanical, optical, morphological, and thermal properties of PVC/PEO blends have already been studied in the literature. [2][3][4][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] However, data on the miscibility of PVC and PEO are contradictory. Margaritis and Kalfoglou 10 found that PVC and PEO were miscible for PVC-rich blends according to results obtained by dynamic mechanical analysis, differential scanning calorimetry, and optical microscopy.…”

“…Similarly, Marco et al 11 by 13 C NMR study concluded that the PEO/PVC blend was thermodynamically stable at PVC content > 40 %. Vice versa, Castro et al 18 pointed out that PVC/PEO blends were miscible at PVC content < 60 %. On the other hand, by inverse gas chromatography (IGC) Etxeberria et al 12 observed that the blends were more miscible at high PVC content (80 wt% PVC) or PEO content (80 wt% PEO), while the two polymers were less compatible at PVC/PEO composi- 4 investigated the miscibility of PVC with PEO by viscosimetric, microscopic and thermal analyses, and showed that miscibility was dependent on the molecular weight of PVC, thus when low molecular weight PVC is used, miscibility could be expected.…”

“…PVC/PEO blends were usually prepared by solution casting. 2,4,8,11,13,14,18,19,21 Because the polymer miscibility is often due to strong intermolecular interactions like hydrogen bonding, studies of miscibility carried out in solution may produce a system, which would be much closer to equilibrium in comparison to the system obtained by other techniques, e.g. extrusion.…”