One-pot solvent-free green strategy to fabricate ultra-efficient polyphosphoester flame retardant for Poly(Lactic acid)

Tremendous attention has been dedicated to crafting eco-friendly flame retardants with excellent comprehensive performance via green means. Herein, a novel ultra-efficient polyphosphoester (PPE) flame retardant was synthesized via a facile one-pot method of solid-phase polycondensation reaction. PPE...

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Published in:Composites. Part B, Engineering Engineering, 2024-04, Vol.274, p.111236, Article 111236
Main Authors: Bai, Zhicheng, Yin, Feixiang, Shen, Jiahao, Xu, JinJia, Chen, Fengqing, Huang, Teng, Li, Hufeng, Xie, Dan, An, Yi, Zhang, Wenbiao, Dai, Jinfeng
Format: Article
Language:English
Subjects:
Crystallization behavior
Flame retardancy
Green synthesis
Mechanical properties
Poly(lactic acid)
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Summary:Tremendous attention has been dedicated to crafting eco-friendly flame retardants with excellent comprehensive performance via green means. Herein, a novel ultra-efficient polyphosphoester (PPE) flame retardant was synthesized via a facile one-pot method of solid-phase polycondensation reaction. PPE was then employed as a multifunctional additive for high-performance poly (lactic acid) (PLA). Benefiting from the dual-phase flame-retardant effect, the resultant PLA composite with merely 0.5 wt% PPE exhibited a desired limiting oxygen index (LOI) value of 26.1 %, and a satisfactory V0 rating of UL-94 (1.6 mm) with well-preserved mechanical properties. Due to the nucleating effect of PPE on PLA, the mechanical properties and crystallization ability of the PLA composites were both gradually enhanced as PPE content increased from 0.3 to 1.5 wt%. The designed ultra-efficient approach, enhancing fire safety and mechanical properties simultaneously at a low content, lays a foundation of an affordable, eco-friendly, and versatile flame retardant for potential applications of PLA. [Display omitted] •An ultra-efficient polyphosphoester (PPE) was synthesized using a one-pot, solvent-free method of polycondensation.•0.5 wt% PPE endows PLA with desired flame retardancy and satisfactory mechanical properties.•PPE enhances the thermal stability and crystallization ability of PLA.•PPE acts in both gas and condensed phases during combustion.
ISSN:1359-8368
1879-1069
DOI:10.1016/j.compositesb.2024.111236