Synthesis and self‐assembly of fluorinated block copolymers

Abstract

Fluorinated block copolymers combine the unique properties of fluoropolymers and the intriguing self-assembly of hybrid macromolecules. The preparation of the title molecules by selective fluorination procedures and the effect of fluorine incorporation on the material thermodynamics are presented. We highlight two fluorination schemes developed in our laboratory, difluorocarbene and perfluoroalkyliodide additions to polydienes, that allow for the selective and tunable incorporation of different fluorinated groups into model block copolymers. The fluorination changes the physical properties of the parent materials and leads to interesting changes in the component incompatibilities. The role of fluorination in determining block copolymer thermodynamics in both the solid state and in solution and in ultimately exploiting fluorination to produce novel, higher order structures is central to our research efforts.

Nanostructure, Morphology, and Properties of Fluorous Copolymers Bearing Ionic Grafts

“…65,66 These amphiphilic fluorous-ionic diblock copolymers were found to display varying degrees of nanophase separation dependent upon the ion content (IEC) of the styrene block. For 0.9-1.2 mmol/g IEC membranes, distinct perforated lamellae were observed.…”

Using organoclay to promote morphology refinement and co-continuity in high-density polyethylene/polyamide 6 blends – Effect of filler content and polymer matrix composition

“…The distinguishing feature of co-continuous morphologies is the mutual interpenetration of the phases, which is often desirable as it may result in a remarkable combination of functional and structural properties of the blend constituents [3e5]. In addition, co-continuous morphologies allow the removal of one phase, which results in porous, high-surfacearea structures that can be used in a wide range of applications, including separations, catalysis, and templating [6].…”

Modification of PTFE nanopowder by controlled electron beam irradiation: A useful approach for the development of PTFE coupled EPDM compounds

“…New approaches were considered to surface modification of PTFE via different procedures [6][7][8][9][10]. Significant developments were also made both in the synthesis and manufacturing of new commercial fluorpolymers with improved mechanical properties [11][12]. However, electron beam modification provides a simple and effective method for modification of PTFE powder [13][14][15][16][17][18][19][20].…”