Miscibility enhancement via ion-dipole interactions. 1. Polystyrene ionomer/poly(alkylene oxide) systems

Abstract

It is shown that ion-dipole interactions can lead to miscibility enhancement in polymer blends.While polystyrene is not miscible with poly(ethy1ene oxide) or poly(propy1ene oxide), styrene ionomers show very high miscibility with t h e materials at low alkylene oxide contents (10 w t %) and high, though not complete, miscibility at higher loading levels. For these systems it is seen that the glass transition temperature (from G" peak positions) of the styrene ionomer is depressed dramatically with increasing alkylene oxide contents and that the glass transition of the alkylene oxide rises appreciably (in most cases) with increasing styrene ionomer content. Increases in ion content at constant styrene levels increase the miscibility. The degree of miscibility enhancement is comparable to that achieved in hydrogen-bonded systems. Finally, molecular weight effects observed here are quite similar to those seen in other blend systems.

Miscibility of Poly(vinyl alcohol)/Poly(methacrylic acid) and Poly(vinyl alcohol)/Poly(acrylic acid) Systems: I. High-Resolution NMR Studies in Solution

“…2 ,3 Some of incompatible polymer pairs are successfully mixed at the molecular level by introducing interacting groups. [4][5][6][7][8] In particular, hydrogen bonding as an important interaction has been investigated extensively from points of view of thermodynamic theory, phase behavior, miscibility, and so on. 9 -11 Poly(vinyl alcohol) (PYA), poly(methacrylic acid) (PMAA), and poly(acrylic acid) (PAA) all have strong hydrogen bonding donor and acceptor groups, and are considered to easily form compatibile blends.…”

Mechanical properties of molecular composites. I. Poly (p-phenylene terephthalamide) anion molecules dispersed in poly(4-vinylpyridine)

“…20 It may be anticipated therefore that ion-dipole interactions will also lead to enhanced miscibility in molecular composites of ionically modified PPTA dispersed in a polar PVP matrix. Since one indication of miscibility down to the level of 0.1 m is optical transparency, 21 samples of the various molecular composites were examined for optical clarity.…”

Investigating the Compatibility of Polymers in Common Solvent

“…Therefore, varying the interactive forces among the constituents of the system one can get the material of required mechanical properties. [1][2][3][4][5][6][7][8][9][10][11][12] This is the one of the reasons that miscible polymer blends are receiving more importance in industrial applications. 13,14 However, the main problem associated with blending polymers is the determination of degree of compatibility.…”