Abstract
A linear diamides derivative (TMC300) as a nucleating agent (NA) was incorporated into biodegradable poly(ethylene succinate) (PES) to investigate effect of TMC300 on nucleation, crystallizability, crystallization kinetics, aggregated structure of PES. TMC300 enhanced significantly crystallizability and crystallization temperature of PES in cooling process at a rate of 10 ℃/min from molten state, indicating that TMC300 exhibits an excellent nucleation effect on PES. IR measurement suggested that TMC300 interacts with amorphous carbonyl and ester segment, and crystalline CH2 segment of PES via hydrogen bond. Change rate of carbonyl group is comparable to that of C‒C backbone of PES, regardless of the presence or absence of TMC300. Small difference of diffraction peak in WAXD measurement between neat PES and PES/TMC300 is probably attributed to spherulitic orientation on film surface of neat PES, and different spatial arrangements in the same crystal lattice. TMC300 enhanced carbon residue yield of PES/TMC300 composite, probably related to slight flame retardance effect.
Highlights
Polyester material has attracted more and more interests from scientists, engineers and environmentalists due to its good mechanical properties, biodegradation and biocompatibility, and is considered as a promising biomaterial to replace traditional petroleum-based plastic with non-biodegradation
Upon incorporation of the TMC300, a sharp crystallization peak appeared with the fraction of the TMC300 (fTMC300) = 0.3%, indicating the TMC300 as an effective nucleating agent (NA) enhanced significantly the crystallizability
The cold crystallization peak is an indicative of the rearrangement or adjustment of neat Poly(ethylene succinate) (PES) molecular chains in the heating process, that is, the insufficient crystallization occurred or the degree of the crystallinity is low for neat PES in the former cooling process
Summary
Polyester material has attracted more and more interests from scientists, engineers and environmentalists due to its good mechanical properties, biodegradation and biocompatibility (or low toxicity), and is considered as a promising biomaterial to replace traditional petroleum-based plastic with non-biodegradation. It has been widely applied in the medical material, disposable container, food packaging and agricultural film [1,2,3,4,5,6,7,8]. The in-depth exploration of the crystallization kinetics and aggregated structure is of scientific importance to tailor the physical properties and performances of the polymeric material. The PES shows the extremely low crystallizability and no discernible crystallization peak can be found in its cooling process (as presented in Fig. 1), resulting in long processing cycle and increased time cost in the processing
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