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Article Dans Une Revue Polymer Testing Année : 2019

An effective flame retardant containing hypophosphorous acid for poly (lactic acid): Fire performance, thermal stability and mechanical properties

Xingguo Wang
  • Fonction : Auteur
Jun Sun
Xiaodong Liu
Shengling Jiang
  • Fonction : Auteur
Julin Wang
  • Fonction : Auteur
Hongfei Li
  • Fonction : Auteur
Xiaoyu Gu
  • Fonction : Auteur
  • PersonId : 765935
  • IdRef : 16476142X
Sheng Zhang
  • Fonction : Auteur

Résumé

An effective flame retardant N, N′-bis [salicylidene hypophosphorous acid]-1, 2-ethylenediamine (SHPE) was synthesized by a Kabachnik-Fields reaction between hypophosphorous acid and a Schiff base compound. The chemical structure was confirmed by FTIR, 1HNMR and organic element analysis. SHPE was melt blended with poly (lactic acid) (PLA) matrix to enhance the flame retardancy. Fire behavior evaluation of PLA composites indicated that the presence of 10 wt% SHPE increased the LOI value up to 28.3%, developed the UL-94 grade to V-0 rating, and significantly decreased the peak heat release rate (pHRR) and total heat release (THR) of PLA composites. The analysis of X-ray photoelectron spectroscopy (XPS), FTIR, Raman spectrum and scanning electron microscope (SEM) demonstrated that SHPE exerted flame retarding effect in both gas and condense phases. It was proposed that the presence of SHPE catalyzed random chain scission of PLA, and accelerated the formation of melt dripping to take away heat during combustion. The elongation at break of PLA/SHPE composites were increased compared with that of PLA. The compatibility of SHPE and APP in PLA was also compared.
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Dates et versions

hal-02180613 , version 1 (11-07-2019)

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Citer

Xingguo Wang, Jun Sun, Xiaodong Liu, Shengling Jiang, Julin Wang, et al.. An effective flame retardant containing hypophosphorous acid for poly (lactic acid): Fire performance, thermal stability and mechanical properties. Polymer Testing, 2019, Polymer Testing, ⟨10.1016/j.polymertesting.2019.105940⟩. ⟨hal-02180613⟩
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