Synthesis of a deoxybenzoin derivative and its use as a flame retardant in poly(trimethylene terephthalate)

Abstract

A Friedel–Crafts acylation reaction was used to synthesize a deoxybenzoin derivative named bis[2,6‐dimethyl‐4‐(2‐phenyl acetyl)phenyl]phenyl phosphonate (BDPP), which could be used as a flame‐retardant additive in poly(trimethylene terephthalate) (PTT) resin. The limited oxygen index and cone calorimetry tests indicated that the introduction of 5 wt % BDPP significantly improved the flame‐retardant properties of PTT through a synergistic char‐formation mechanism in the condensed phase and a flame‐inhibition mechanism in the gas phase. The PTT–BDPP blend also demonstrated an evident reduction in the melt viscosity but a superior melt stability in comparison to the neat PTT. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45904.

High-Performing and Fire-Resistant Biobased Epoxy Resin from Renewable Sources

“…62 Usually, the char formation will insulate the polymer−air interface, reduce the heat conduction, and starve the combustion process of decomposition products. 53 In previous literature, 48−52 the deoxybenzoin-containing polymers have demonstrated good flame-retardant properties due to their high yield of carbonization and low heat-release rates. The reason was ascribed to the dehydration of deoxybenzoin moieties at high temperature to form diphenylacetylene, and then carbonization via cyclization and aromatization.…”

“…As we know, the char yield in nitrogen is related to the flame retardancy of thermosets . Usually, the char formation will insulate the polymer–air interface, reduce the heat conduction, and starve the combustion process of decomposition products . In previous literature, − the deoxybenzoin-containing polymers have demonstrated good flame-retardant properties due to their high yield of carbonization and low heat-release rates.…”

“…In Scheme , the chemical structure of daidzein is illustrated, which has a certain similarity to those of 4,4′-bishydroxydeoxybenzoin (BHDB) and BPA. In previous literature, − the fire resistances of BHDB-containing polymeric materials have been reported, and their high char formation and low heat-release rates are attributed to the presence of the deoxybenzoin structure. However, BHDB is usually prepared by the demethylation of desoxyanisoin in the harsh process conditions.…”

Synthesis of a novel polyphosphate and its application with APP in flame retardant PLA

“…Clearly, PLA/15PFRS could generate the P]O (1258 cm À1 ) volatiles from 17 min to 19 min, which were deemed as free radical scavengers and had excellent quenching effect for ame-inhibition in gas phase. 43,44 However, there were no peaks at 1258 cm À1 of PLA/3.8PFRS/11.2APP during the degradation process, indicating the presence of phosphoruscontaining fragments were le in solid phase to catalyze the char production of PLA as discussed in thermal gravimetric analyses. Furthermore, this char residue prevented hydrocarbons entering into gas phase and hence there was a sharp drop of the absorbance in Fig.…”

Combining Mechanical Fortification and Ultralow Flammability in Epoxy Networks

“…[ 31 ] Moreover, Hu described blending deoxybenzoin and phosphorus‐based additives with poly(trimethylene terephthalate) to give a synergistic response in char formation (condensed phase) and flame‐inhibition (vapor phase). [ 32 ] Thus, deoxybenzoin‐based groups are excellent flame retardants in their own right and in some cases appear to exhibit synergistic interactions with phosphorus‐containing additives. [ 33 ]…”