Second generation polymer ionic

Figure 6.17 Conductivity trends of various types of polymer ionic membranes, such as the PEO-LiX complex (first generation), the MEEP-LiX complex and the PUE-LiX complex (second generation), and the PAN-PC-EC-LiX system (third generation).

FIGURE 13.16 Second generation ACOMP used to determine how much composition of anionic SS a copolymer with NIPAM can have and still exhibit an LCST (at lOmM ionic strength) fractional conversion of SS and total comonomers and average instantaneous SS composition (top). LS at 90° (log scale) for three detectors at different temperatures increases abruptly at the LCST when there is only about 4% SS in the copolymer (bottom). Adapted with permission from McFaul CA, Alb AM, Drenski MF, Reed WF. Simultaneous multiple sample light scattering detection of LCSTduring copolymer synthesis. Polymer 2011 52 4825 833. 

Berthod, A., Crank, J.A., Rundlett, K.I. Armstrong, D.W.(2009). Second-generation ionic liquid matrix-assisted laser desorption/ ionization matrix for effective mass spectrometric analysis of biodegradable polymers. Rapid Commun, Mass Spectrom.Yol.23 (No.21) 3409-3422. 

Finally, a new water-soluble polyphosphazene was recently synthesized that has the structure shown in 36 (46). This polymer has two attributes as a biomedical macromolecule. First, the pendent carboxylic acid groups are potential sites for condensation reactions with amines, alcohols, phenols, or other carboxylic acid units to generate amide, ester, or anhydride links to polypeptides or bioactive small molecules. Second, polymer forms ionic crosslinks when brought into contact with di- or trivalent cations such as Ca or Ai3+. The crosslinking process converts the water-soluble polymer to a hydrogel, a process that can be reversed when the system... 

---