Polymer networks by ionic association and covalent fixation based on ring opening of cyclic ammonium ions

In a second part, pyrrolidinium ion containing (co)polymers were reacted with carboxylate ion containing (co)polymers to form the corresponding inter polymer complexes (IPCs) which were subsequently heat-cured. The first was an IPC obtained by mixing the water-soluble (co)polymer of N,N-diallylpyrrolidinium chloride (DAPC) with sodium acrylate (co)polymer. Heating of the dry IPC film or powder resulted in ring-opening of the pyrrolidinium ions by the carboxylate ions leading to covalent networks. A second type of IPC was obtained by mixing copolymers of N-(vinyl benzyl)pyrrolidine (VBP) with acrylic acid copolymers. The thus obtained IPCs are transformed into covalent polymer networks by curing at 130 °C. Also IPCs with different structural units (for ex. VBP-Styrene copolymer with acrylic acid-butyl acrylate copolymer) could be formed and cured leading to polymer-co-networks.