Ring-opening polymerization polycarbonate synthesis

Efficient methods for the synthesis of cyclic bisphenol-A polycarbonates have provided a practical technology for the rapid synthesis of high molecular weight bisphenol-A polycarbonates by anionic ring-opening polymerization as shown in Equation 7.29 [150]. A mixture of cyclic oligomers (M 1300) was polymerized with lithium... 

Immobilized CALB has frequently been applied in the literature as a catalyst for polymerization of aliphatic polyesters, polycarbonates, polyurethanes and their copolymers. In the present work on CALB catalyzed polymerization, the ring opening of e-caprolactone to polycaprolactone was selected as the model polymerization reaction (Figure 3.3). This model reaction has been well established in the literature [24-27] as an example of a polymerization reaction that can be successfully catalyzed by immobilized lipases (see also Chapter 4). Polymer synthesis and characterization was performed in four steps (i) polymerization (ii) separation (iii) purification and (iv) characterization. 

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