Thermoset Magnetic Materials Based on Poly(ionic liquid)s Block Copolymers

Abstract

A new methodology for the preparation of nanostructured magnetic thermoset materials without any kind of metal oxide or metal magnetic nanoparticles has been proposed. The present study focuses on the nanostructuration of thermoset materials based on poly(ionic liquid)s block copolymer and the subsequent production of magnetic nanostructured thermoset. Judicious selection of block copolymer, such as P2VP-b-PMMA, soluble in epoxy and its subsequent quaternization leads to a phase modification of the system, from totally soluble to a nanostructured system. Different degree of quaternization of the pyridine groups showed the range of quaternization values which allowed the nanostructuration of the thermoset. Magnetic material was obtained by anion exchange of the quaternized poly(ionic liquid) block copolymer without using any kind of metal oxide or metal magnetic nanoparticles. The different materials obtained by quaternization of the block copolymers, the anion exchange of the polymeric ionic liquid and thermoset materials were characterized by 1H nuclear magnetic resonance (1H NMR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), high resolution transmission electron microscopy (HR-TEM) and magnetic properties were measured by a superconducting quantum interference device (SQUID).

Influence of block sequence and molecular weight on morphological, rheological and dielectric properties of weakly and strongly segregated styrene-isoprene triblock copolymers

“…They exhibit particular properties which are caused by the combination of different blocks most often leading to self-assembled periodic microphase separated structures. The application of block copolymers in modern material science varies from blends [5][6][7][8][9][10][11][12], nanopatterning [13][14][15][16][17][18] to membranes [19][20][21][22][23][24][25][26][27].…”

Synthesis via ATRP, kinetics study and characterization (molecular‐morphological) of 3‐Arm star diblock copolymers of the (PS‐b‐P2VP)3 type

“…Block copolymers containing PVP segments, either P2VP or P4VP, are very interesting due to their amphiphilicity or pH‐responsiveness. Moreover, the ability for chemical modification, through quaternization of the nitrogen atom per monomeric unit, with high yields, in both poly(2‐vinylpyridine) or poly(4‐vinylpyridine), leads to different properties for the block copolymers, including chemical modification with magnetic nanoparticles and behavior as polymer ionic liquids …”

Polymerized ionic liquid block copolymers for electrochemical energy

“…In this paper, we will highlight the recent work on PIL block copolymers, specically, their synthesis and unique solid-state properties, as it applies to electrochemical energy. Within these techniques, generally two overarching strategies have been used to produce PIL block copolymers: the sequential polymerization of multiple non-ionic monomers followed by subsequent functionalization or quaternization of one of the monomers 11,12,14,27,[30][31][32][33][34]42,43 and the direct sequential polymerization of a non-ionic monomer and an IL monomer. Within these techniques, generally two overarching strategies have been used to produce PIL block copolymers: the sequential polymerization of multiple non-ionic monomers followed by subsequent functionalization or quaternization of one of the monomers 11,12,14,27,[30][31][32][33][34]42,43 and the direct sequential polymerization of a non-ionic monomer and an IL monomer.…”