Poly ether ester Bioelastomers

Poly(ether ester) bioelastomers are composed of polyether soft segments and polyester hard segments, and exhibit a thermoplastic property. They present a 

---

The thermoplastic poly(ethylene glycol)/poly(butylene terephthalate) (PEG/ PBT) is the most representative and mature poly(ether ester) bioelastomer, whose molecular structure is shown in Scheme 8.23, being usually synthesized by ester exchange methods. Tg of the PEG/PBT bioelastomers is lower than 30 °C. Their in vitro and in vivo degradation happens both by hydrolysis and oxidation, in which hydrolysis is the main degradation mechanism. 

Scheme 8.24 Molecular structure of the phosphate-introduced poly(ether ester) bioelastomers.

---