Cylindrical Micelles of Wormlike Polyelectrolytes

Abstract

We report on a study of the association behavior in solution of semirigid polymers consisting of a poly(p-phenylene) backbone with alternation of negatively charged and hydrophobic moieties. Small-angle X-ray scattering data of aqueous solutions of sulfonated poly(p-phenylene)s show aggregated polymer chains in the form of cylindrical micelles, in which the phenylene backbone is oriented parallel to the long axis of the micelle. The charge density and the length of the alkyl side chains influence the diameter and aggregation number of the micelles. Micelles with strand aggregation numbers between 3 and 11 are formed depending on the hydrophobic−hydrophilic balance. The observed behavior resembles the formation of supermolecular structures by biogenic semirigid polyelectrolytes.

Adsorption of anionic polyelectrolytes to dioctadecyldimethylammonium bromide monolayers

“…However, poly(p-phenylene)s show strong interaction between the chains, because of the rigid rod character of the molecules. The formation of aggregates in solution has been described previously [43,44]. It can be conjectured that the complex formed at the air/water interface also has a strong tendency to form supramolecular aggregates.…”

Suzuki Polycondensation: Polyarylenes à la Carte

“…[36,37] Furthermore, the synthesis of PPP-based polyelectrolytes and elucidation of their unique solution behavior needs to be mentioned as another consequence of the synthetic tools developed by the MPI-P group (see also Chapter 6.1). [38,39] In the further parts of this review, we will concentrate on the synthetic aspects in detail and leave the description of the consequences of progress in synthesis on the evolution of a better understanding of the physical properties of macromolecular materials to another place and time. However, as was mentioned above, the development of the synthetic tools to create materials based on polyarylenes was largely driven by theoretical considerations: the desire was to have a rational synthesis at hand which allows creating shape persistent chains and investigating their properties in dilute solution as well as in the bulk.…”

Nanocomposites of Hairy‐Rod Macromolecules: Concepts, Constructs, and Materials

“…In the context of this review it is important to mention that a synthetic path to hairy-rod polyelectrolytes, that is poly(p-(alkyl)phenylsulfonate)s (PPPS) has become available. [62][63][64][65] These high-molecular-weight rigid-rod polyelectrolytes have attracted much interest in recent years because they show archetypical behavior with regard to micelle and aggregate formation much akin to what one also sees in some of the more important biogenic polyelectrolytes. The general features are summarized in Figure 12 and 13.…”