A method for simultaneously improving the flame retardancy and toughness of PLA

Abstract

In order to modify the brittleness and flame retardant properties of poly(lactic acid) (PLA), a series of flame retardant toughened PLA composites were prepared using poly(ethylene glycol) 6000 (PEG6000) as a toughening and charring agent together with ammonium polyphosphate (APP) as an acid source and blowing agent. The fire and thermal behavior of PLA/PEG/APP composites was evaluated by limiting oxygen index (LOI), UL‐94, cone calorimeter, and thermogravimetric analysis (TGA). The results showed that the PLA/PEG/APP system had good charring ability and could improve the flame retardancy of PLA. When the content of APP in the composites was more than 5 wt%, all samples could reach UL‐94 V‐0 rating. The results of mechanical property tests demonstrated that the brittleness of PLA was also improved after blended with PEG6000. All the PLA/PEG/APP composites with an APP content of less than 10 wt% showed an obvious neck and fracture behavior, that is, the tensile behavior of PLA was changed from brittle to ductile. Copyright © 2010 John Wiley & Sons, Ltd.

PLA-b-PEG/magnetite hyperthermic agent prepared by Ugi four component condensation

“…Moreover, the residue in the case of UMC was negligible. Therefore, these results are in agreement with those that have been previously reported [67]. In addition, the chemical linkage between PEG, PLA and magnetite could be confirmed by the FTIR spectra of Ugi magnetite composite ( Figure 11).…”

Intumescence: Tradition versus novelty. A comprehensive review

“…APP has been also combined with a simple poly(ethylene glycol) [285]. Efficient alternative to APP turned out to be AlPi coupled with nanoparticles having a different aspect ratio [168], PEPA derivatives [286], PEPA coupled with POSS [165] or aryl polyphosphates [287].…”

Synthesis of organo-modified α-zirconium phosphate and its effect on the flame retardancy of IFR poly(lactic acid) systems

“…Wang et al found that the incorporation of an intumescent flame retardant and ZnAl-LDH was very efficient in improving the flame retardance of PLA composite [3]. In our recent studies, we report a series of flame retardant toughened PLA composites that have been prepared using poly(ethylene glycol) (PEG6000) and ammonium polyphosphate (APP) [4]. In the meantime, a novel method of synthesis of phosphorus-containing poly(lactic acid) to improve the flame retardance of PLA has been developed in our latest work [5].…”