Synthesis of anhydrous manganese hypophosphite microtubes for simultaneous flame retardant and mechanical enhancement on poly(lactic acid)

Yang, Wei; Yang, Wenjie; Tawiah, Benjamin; Zhang, Yang; Wang, Lili; Zhu, San‐E; Chen, Timothy Bo Yuan; Yuen, Anthony; Yu, Bin; Liu, Yunfeng; Si, Jingyu; Hu, En-Zhu; Lu, Hongdian; Hu, Kunhong; Chan, Qing Nian; Yeoh, Guan Heng

doi:10.1016/j.compscitech.2018.05.023

Cited by 52 publications

(23 citation statements)

References 52 publications

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“…Compact chars serve as a barrier to heat and reduce gaseous exchanges between the flame zone and the unburnt polymer composites [29]. Generally, the formation of carbonaceous intumescent char often shields and suppresses heat and mass loss rate of the composites and result in reductions in the flame spread and heat reduction [46]. The DSC curves of PLA, PLA/P-TAB, PLA/P-TAB/ WF composites are presented in Figure 4 with the related data in Table 3.…”

Section: Thermal Properties Of P-tab Wf and Its Pla Biocompositesmentioning

confidence: 99%

Flame retardant poly(lactic acid) biocomposites reinforced by recycled wool fibers – Thermal and mechanical properties

Tawiah¹,

Yu²,

Ullah

et al. 2019

Express Polym. Lett.

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The inherently poor flame retardancy and comparatively low tensile strength of poly(lactic acid) (PLA) have limited its wide adoption as alternative 'green' engineering plastic in many fields. This manuscript reports the synthesis of a new phosphorus flame retardant-phenylphosphonic 3(2-aminobenzothiazole) (P-TAB) and its combination with recycled short wool fibers (WF) for improving the flame retardancy and the mechanical properties of PLA. Fourier transform infrared (FTIR), 1 H, and 13 C nuclear magnetic resonance (NMR) spectra proved that P-TAB was effectively synthesized. Considerable reductions in heat release rate, total heat released, CO and CO 2 produced were attained with 3 wt% P-TAB and various WF loadings. The fire performance index (FPI), and fire growth index (FGI) improved by 38.2 and 48.1% respectively. The composite achieved a V-0 rating at 20 wt% WF loading and an LOI value of 28.5%. TG-IR results showed substantial reductions in evolved gaseous products. The tensile strength and Young's modulus improved significantly with the increasing content of WF in the composite.

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Section: Thermal Properties Of P-tab Wf and Its Pla Biocompositesmentioning

confidence: 99%

Flame retardant poly(lactic acid) biocomposites reinforced by recycled wool fibers – Thermal and mechanical properties

Tawiah¹,

Yu²,

Ullah

et al. 2019

Express Polym. Lett.

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“…1 These salts are used as reductive, antioxidant, anticorrosive, animal feed, flame retardant in polymer, medicine, metal, and food industry. [1][2][3][4][5][6][7] Mn(H2PO2)2 is used as a chemical intermediate in pharmacy and polymer technology, and to increase fiber quality in nylon carpet fiber production. 4,5 In a study, Yang et al has determined that Mn(H2PO2)2 has high flame-retardant effect.…”

Section: Introductionmentioning

confidence: 99%

Solid-liquid phase equilibria of H2O-Mn(H2PO2)2-MnCl2-NaCl, H2O-Mn(H2PO2)2-MnCl2 and (H2O-NaCl- MnCl2 systems at 323.15 K

Adigüzel

2021

JSCS

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The solid-liquid phase equilibria (SLE) and densities of H2O-NaCl- -MnCl2-Mn(H2PO2)2 quaternary system, H2O-NaCl-MnCl2 and H2O-MnCl2- -Mn(H2PO2)2 ternary systems were investigated at 323.15 K by the isothermal solution saturation method. The analyses of the liquid and solid phases were used to determine the composition of the solid phase using the Schreinemakers graphic method. The ternary systems contain one invariant point, two invariant curves and two crystallization regions. In the quaternary system, there is one invariant point, three invariant curves, and three crystallization areas corresponding to NaCl, MnCl2 4H2O, and Mn(H2PO2)2H2O. The crystallization area of Mn(H2PO2)2 H2O, being the largest in comparison with those of other salts, occupied 80.75 % of the total crystallization area.

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“…Thus, nonhalogen flame retardants, including the phosphorus‐, nitrogen‐, and silicon‐based compounds have attracted great attention and will gradually replace the halogenated flame retardants . Recently, metal hypophosphites, as halogen‐free flame retardants, are widely used to improve the flame retardancy of polymeric materials . Because of its good thermal stability, chemical stability, and environmental‐friendly characteristics, aluminum hypophosphite (AHP) has been employed to improve flame retardancy of polymers .…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect between phosphorus tailings and aluminum hypophosphite in flame‐retardant thermoplastic polyurethane composites

Zhou

Gong

Zhou

et al. 2019

Polymers for Advanced Techs

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The massive accumulation of phosphorus tailings (PT) not only occupies land resources and also causes great threat to ecological environment and human security.It is of great significance to explore the resource utilization of PT in some fields. Herein, aluminum hypophosphite (AHP) and PT are blended together to enhance the flame retardancy of thermoplastic polyurethane (TPU) composites, and the synergistic effects between AHP and PT are investigated systematically. Cone calorimeter test (CCT) results indicate that the peak heat release rate (PHRR) and total heat release (THR) of the samples containing 25 wt% AHP are decreased by 89% and 68%, respectively, and the total smoke release (TSR) show a reduction of 58.8%, in comparison with those of neat TPU. For the sample TPU/22.5AHP/2.5PT, the PHRR, THR, and TSR are decreased by 91.2%, 70%, and 63%, respectively. Scanning electron microscopy (SEM) analysis results demonstrate that the addition of PT can facilitate the generation of dense and compact char layers, preventing the release of heat and smoke effectively. All the abovementioned results indicate that the synergistic effects are existed between AHP and PT for enhancing the fire safety of TPU composites, which can provide a new way for the utilization of PT. KEYWORDS aluminum hypophosphite, flame retardant, phosphorus tailings, synergistic effect

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Synthesis of anhydrous manganese hypophosphite microtubes for simultaneous flame retardant and mechanical enhancement on poly(lactic acid)

Cited by 52 publications

References 52 publications

Flame retardant poly(lactic acid) biocomposites reinforced by recycled wool fibers – Thermal and mechanical properties

Flame retardant poly(lactic acid) biocomposites reinforced by recycled wool fibers – Thermal and mechanical properties

Solid-liquid phase equilibria of H2O-Mn(H2PO2)2-MnCl2-NaCl, H2O-Mn(H2PO2)2-MnCl2 and (H2O-NaCl- MnCl2 systems at 323.15 K

Synergistic effect between phosphorus tailings and aluminum hypophosphite in flame‐retardant thermoplastic polyurethane composites

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