Modular polymer

The idea of exploiting these new conducting polymers for the development of flexible diodes and junction transistors, as well as for selective field effect transistor sensors, has been proposed and experimentally confirmed, and thus we may, perhaps optimistically, look forward to a time when popular electronic devices can be based on low cost, flexible and modular polymer components. 

Chart 10.1 Four biomimetic modules used in our design of modular polymers (a) strong quadmple H bonding motif to form loops, (b) strong quadmple H bonding motif to form double-closed loop (DCL) modules, (c) peptidomimetic 8-sheet motifs to form DCL modules, and (d) small mechanically stable proteins as domains. 

The single chain force-extension curves for both the control polymer (9) and the modular polymer (8) are shown in Figure 10.3 (Guan et al. 2004). For control... 

Figure 10.3 AFM single chain force-extension data, (a) An overlay of representative force-extension curves for modular polymer 8. Sawtooth patterned curves were consistently obtained, (b) One representative single chain force-extension curve for control polymer 9, in which only one peak was observed, (c) A single chain force-extension curve for modular polymer 8 shows the characteristic sawtooth pattern with three peaks. In Figure 10.2b and c, all scattered dots represent experimental data and the solid lines are results from WLC fitting. Adapted from Guan et al. (2004). Copyright 2004 American Chemical Society.

Figure 10.4 Stress-strain curves for control and modular polymers. The curve in the bottom...

Synthesis and Single Molecule Nanomechanical Studies of Peptidomimetic fi-Sheet Modular Polymers... 

Chart 10.2 Different folding topologies in the first-generation UPy modular polymer. 

Figure 10.5 Schematic representation of /8-sheet peptidomimetic modular polymer composed of douhle-closed loop monomers. Adapted from Roland and Guan (2004). Copyright 2004 American Chemical Society.

Scheme 10.4 Synthesis of peptidomimetic double-closed loop (DCL) monomer and modular polymer.

Figure 10.4 Stress-strain curves for control and modular polymers. The curve in the bottom (—) is for the polyurethane (PU) made fiom poly(tetramethylene glycol) and...

Kushner AM et al (2009) A biomimetic modular polymer with tough and adaptive properties. J Am Chem Soc 131 8766-8768... 

Fang X, Zhang H, Chen Y, Lin Y, Xu Y, Weng W (2013) Biomimetic modular polymer with tough and stress sensing properties. Macromolecules 46 6566-6574... 

Fig. 14 Concept of biomimetic modular polymer design, (a) A small section of titin, which has 200-300 repeating immunoglobulin domains, (b) Design of modular polymer containing multiple loops held by secondary forces. Reprinted with permission from [69]. Copyright 2004 American Chemical Society...

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