Biocompatible linear diamides derivative-nucleated biodegradable poly(ethylene succinate): Tailored crystallization kinetics, aggregated structure and thermal degradation

A biocompatible linear organic nucleator (EBH) was incorporated into biodegradable linear aliphatic poly(ethylene succinate) (PES) polyester to investigate effect of EBH on crystallization kinetics, aggregated structure and thermal stability of PES. Crystallization kinetic results suggested that EBH enhanced significantly crystallization rate and decreased substantially crystallization time of PES, and EBH is an excellent nucleator of PES. FTIR measurement indicated that hydrogen bond interaction exists between carbonyl group (of crystalline phase) and ester group (of amorphous phase) of PES and EBH. In-situ FTIR results revealed that upon incorporation of EBH, rearrangement of carbonyl group is faster than C-C backbone of PES in crystallization process. Thermal degradation temperature of PES increased in the presence of EBH. EBH had little effect on crystal structure of EBH. Mechanisms on nucleation and enhanced thermal stability of PES were proposed and discussed in detail. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

The addition of EBH significantly enhances the crystallization rate and thermal stability of PES, with EBH showing good nucleating effects in PES. The hydrogen bond interaction between EBH and PES promotes rearrangement of carbonyl groups during crystallization process.