Polyphosphoesters structures

Figure 6 (Top) General structure of Polyphosphoesters. R and R can be varied to obtain polymers with varied physicochemical properties ranging from gels, to elastomers, to amorphous polymer particles. (Bottom) Example structure of a polylactide-co-ethylphosphate copolymer.

General structure of polyphosphoesters where R = divalent organic groups. 

Figure 2.1 Basic structures for some groups of synthetic polymers commonly employed as degradable materials in medical applications a) polylactide-co-polyglycolides (also commonly used as their homopolymers (i.e., n/m = 0), b) polycaprolactones, c) polydioxanones, d) polyorthoesters, e) polyanhydrides, f) polyalkylcyanoacrylates, g) poly(organo)phosphazenes and h) polyphosphoesters...

Thermoresponsive polyphosphoesters (70) were obtained in copolymerization of structures 11 and 69 and reactivity... 

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