Enhanced flame-retardant performance of poly (lactic acid) (PLA) composite by using intrinsically phosphorus-containing PLA

Yu, Senlong; Zhou, Jialiang

doi:10.1016/j.pnsc.2018.09.002

Cited by 40 publications

(29 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the LDH and DOPO‐LDH spectra, appearing an intense broad band at around 3554 cm −1 was attributed to stretching vibration of hydroxyl between LDH layers . Meanwhile, the characteristic functional groups of DOPO, such as P─Ph, P═O, P─O─Ph, appear at 1476, 1246, 757 cm −1 in the DOPO‐LDH spectrum . In addition, the band appeared about at 1205 cm −1 was assigned to the stretching vibration peak of C─O─C of KH‐560 .…”

Section: Resultsmentioning

confidence: 98%

“…36 Meanwhile, the characteristic functional groups of DOPO, such as P─Ph, P═O, P─O─Ph, appear at 1476, 1246, 757 cm −1 in the DOPO-LDH spectrum. [37][38][39] In addition, the band appeared about at 1205 cm −1 was assigned to the stretching vibration peak of C─O─C of KH-560. 40 It was worth noting that in the DOPO-LDH spectrum, new diffraction peaks appear at 1060 cm -1 , which could be the Si─O─Si bond generated by the self-crosslinking of the coupling agent, 41 and the P─H stretch vibration peak of DOPO at 2436 cm −1 disappeared.…”

Section: Ftir Analysismentioning

confidence: 98%

See 1 more Smart Citation

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

Meng

Leng

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

A novel inorganic and organic composite flame retardant (9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide [DOPO]–layered double hydroxide [LDH]) was synthesized via grafting DOPO with organic‐modified Mg/Al‐LDH, which was introduced into poly (methyl methacrylate) (PMMA) resin to prepare the flame‐retardant PMMA composites. Thermogravimetric analyzer (TGA) showed that the T‐50% of DOPO‐LDH/PMMA composites enhanced by about 20°C, and with the 20% flame retardant, the residual char content can be increased by 39.8% in the air atmosphere compared with LDH/PMMA composites. In the UL‐94 and the limiting oxygen index (LOI) tests, it can be found that compared with LDH/PMMA composites, the LOI value of DOPO‐LDH/PMMA composites were raised evidently with the increased flame retardants, and the droplet combustion was greatly improved. These results could be ascribed to the action of DOPO free‐radical, catalytic charring of polymer and the effect of LDH physical barrier. Moreover, the novel DOPO‐LDH not only given PMMA a good flame‐retardant property and thermal stability, but also have higher visible light transmittance, ultraviolet‐shielding effect, and low loss of mechanical properties, which could further facilitate the wide application of inorganic environment‐friendly flame retardants in general resins and engineering resins and broaden the application of polymers.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Ftir Analysismentioning

confidence: 98%

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

Meng

Leng

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…[15] Senlong et al reported that the flame retardant performance of PLA composites is enhanced by melt blending of neat PLA with DOPO containing PLA (P-PLA), which was synthesized by chain extension of L-Lactide with a DOPO derivative. [16] Flame retardancy tests indicated that the melt blended PLA with a loading of 10 wt.% of P-PLA reached a UL94 V-1 rating with a decreased PHHR value. Further research groups incorporated and investigated other DOPO derivatives in PLA, such as a DOPO-montmorillonite based compound, a DOPO-modified Co-based metal-organic framework (MOF) and a DOPO containing silesquioxane.…”

Section: Introductionmentioning

confidence: 95%

Synthesis of Novel Polymeric Acrylate-Based Flame Retardants Containing Two Phosphorus Groups in Different Chemical Environments and Their Influence on the Flammability of Poly (Lactic Acid)

et al. 2020

View full text Add to dashboard Cite

Novel polymeric acrylate-based flame retardants (FR 1–4) containing two phosphorus groups in different chemical environments were synthesized in three steps and characterized via nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and mass spectrometry (MS). Polylactic acid (PLA) formulations with the synthesized compounds were investigated to evaluate the efficiency of these flame retardants and their mode of action by using TGA, UL94, and cone calorimetry. In order to compare the results a flame retardant polyester containing only one phosphorus group (ItaP) was also investigated in PLA regarding its flame inhibiting effect. Since the fire behavior depends not only on the mode of action of the flame retardants but also strongly on physical phenomena like melt dripping, the flame retardants were also incorporated into PLA with higher viscosity. In the UL94 vertical burning test setup, 10% of the novel flame retardants (FR 1–4) is sufficient to reach a V-0 rating in both PLA types, while a loading of 15% of ItaP is not enough to reach the same classification. Despite their different structure, TGA and cone calorimetry results confirmed a gas phase mechanism mainly responsible for the highly efficient flame retardancy for all compounds. Finally, cone calorimetry tests of the flame retardant PLA with two heat fluxes showed different flame inhibiting efficiencies for different fire scenarios.

show abstract

“…Wang et al synthesized an inherently flame retarded PLA (PPLA I, Scheme 2c) via-chain extending reaction of dihydroxyl terminated pre-poly(lactic) acid (Pre-PLA, Scheme 2c) with ethyl phosphordichloridate and melt blended it with PLA [90]. Another intrinsically phosphorus-containing PLA (PPLA II, Scheme 2d) was synthesized by Yu et al using L-lactide, P-DDS-Ph and hexamethylene diisocyanate (HDI) (Scheme 2d) [91].…”

Section: Synthesis Of Phosphorus-containing Biobased Flame Retardantsmentioning

confidence: 99%

“…PPLA II (Scheme 2d) achieved a V-0 rating when 10 wt% were added in PLA. A LOI value of 28% and a decreased pHRR by 19% was obtained [91].…”

Section: Biobased Flame Retardants In Polyestersmentioning

confidence: 99%

Phosphorus-Containing Flame Retardants from Biobased Chemicals and Their Application in Polyesters and Epoxy Resins

et al. 2019

View full text Add to dashboard Cite

Phosphorus-containing flame retardants synthesized from renewable resources have had a lot of impact in recent years. This article outlines the synthesis, characterization and evaluation of these compounds in polyesters and epoxy resins. The different approaches used in producing biobased flame retardant polyesters and epoxy resins are reported. While for the polyesters biomass derived compounds usually are phosphorylated and melt blended with the polymer, biobased flame retardants for epoxy resins are directly incorporated into the polymer structure by a using a phosphorylated biobased monomer or curing agent. Evaluating the efficiency of the flame retardant composites is done by discussing results obtained from UL94 vertical burning, limiting oxygen index (LOI) and cone calorimetry tests. The review ends with an outlook on future development trends of biobased flame retardant systems for polyesters and epoxy resins.

show abstract

Enhanced flame-retardant performance of poly (lactic acid) (PLA) composite by using intrinsically phosphorus-containing PLA

Cited by 40 publications

References 43 publications

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

A flame‐retardant DOPO‐MgAl‐LDH was prepared and applied in poly (methyl methacrylate) resin

Synthesis of Novel Polymeric Acrylate-Based Flame Retardants Containing Two Phosphorus Groups in Different Chemical Environments and Their Influence on the Flammability of Poly (Lactic Acid)

Phosphorus-Containing Flame Retardants from Biobased Chemicals and Their Application in Polyesters and Epoxy Resins

Contact Info

Product

Resources

About