Synthesis, characterization, and thermal properties of biodegradable polyetheresteramide copolymers based on 11-aminoundecanoic acid

Biodegradable polyetheresteramides synthesized from ϵ‐caprolactone, 6‐aminocaproic acid, and poly(ethylene glycol)

“…There is only one melting transition temperature in each polyetheresteramide. When PEG was incorporated into the polyesteramide main chain, both the melt temperature and crystallinity of PEEA were higher than polyesteramide, which might be due to the increase in flexibility of the macromolecular main chain when small amounts of PEG are present 10. We also could see that the melt temperature and crystallinity of PEEA6‐8 was lower than PEEA6‐4′s, and the melting peak of PEEA6‐8 became wider than PEEA6‐4′s.…”

“…Figure 1 shows the FTIR spectra of the PEEA copolymers. Because the weight fraction of PEG is lower, the absorption peak due to PEG could not be observed in FTIR 10. As a result, there is no distinct difference in FTIR spectra of the three copolymers.…”

“…This copolymer combine characteristics of aliphatic polyamides such as mechanical properties and fiber/film forming with the hydrolytic degradability of the ester bonds 7, 8. Enhanced degradability of polyesteramide can be achieved by incorporating into the chain both hydrophilic and flexible segments consisting of CH 2 CH 2 O groups 10. In our previous' work, a new kind of aliphatic polyesteramide (PEA) copolymer based on ϵ‐caprolactone and 6‐aminocaproic acid was synthesized by the melt polycondensation method, and the PEA fiber undergoes surface erosion in concentrated alkaline solutions 8.…”

Hydrolytic degradation behavior of biodegradable polyetheresteramide‐based polyurethane copolymers

“…In past years, great efforts have been taken in this field of biodegradable polyester‐based copolymers, such as polyesteramide9–11 and polyetheresteramide copolymers 15, 16. According to the previous study, we find that the mechanical property of polyesteramide is great, but its degradation rate is very slowly; for the polyetheresteramide copolymers, its degradation rate is much more quickly, but its mechanical property is limited.…”

“…Synthetic aliphatic polyester was the most extensively studied one among these biodegradable polymers;1, 2 however, its limited mechanical property due to its relatively low molecular weight had restricted its further application. In recent years, polyester‐based copolymers such as polyesteramide copolymer,6–11 polyetheresteramide copolymer,15, 16 and poly(ester‐urethane),12–14 were studied more and more extensively due to its tunable properties.…”