Synergistic effects of BHDB-IPC with AlPi/MCA on flame retarding TPEE

Abstract

The deoxybenzoined-based copolyarylate of BHDB-IPC with perfect charring ability was synthesized. The synergistic effects of BHDB-IPC as a charring agent in TPEE flame retarded by the phosphorous-nitrogen flame retardant (P-N FR) based on the AlPi/MCA were studied using the limiting oxygen index (LOI), the UL94 test, thermogravimetric analysis (TGA), temperature-depend FTIR, laser Raman spectroscopy (LRS), and scanning electron microscopy (SEM). The UL94 test showed that with the BHDB-IPC added to TPEE/P-N FR systems had a synergistic FR effect in condensed phase with AlPi. The TGA data illustrated that BHDB-IPC increased the thermal stability of the TPEE/P-N FR systems and especially the residues at high temperature (T＞700 o C). The synergistic mechanisms between AlPi and BHDB-IPC were analyzed from the temperature-depend FTIR. The residues were analyzed with LRS and SEM, which could provide useful information on the carbonaceous microstructures and the morphological structures. It was demonstrated that the BHDB-IPC promoted the information of stable and compact carbonaceous char which could prevent the melt dripping and improve the flame retardancy. Thus, BHDB-IPC was a promising synergist for the P-N flame retardant in TPEE.

N‐Hydroxy‐1,6‐methano[10]annulene‐3,4‐dicarboximide/Co(OAc)2: A novel catalytic system for the aerobic oxidation of alkylarenes

“…Oxidized alkylarenes are extensively used in the transformations in organic chemistry, 1 preparation of aromatic precursors in pharmaceutical industry, 2 commercial production of oxygen‐containing compounds, 3 development of advanced materials, 4 as well as key intermediates upon the synthesis of fine chemicals 5 . Consequently, synthetic approaches of oxidized alkylarenes have been actively developed including esterification, 6 Friedel‐Crafts acylation, 7 and catalysis 8 .…”

Combining Mechanical Fortification and Ultralow Flammability in Epoxy Networks

“…[ 29,30 ] Interesting recent reports by others described deoxybenzoin‐based polyarylate additives to increase the thermal stability of polyether ester elastomers, with a synergistic flame‐retardant behavior in the presence of a phosphorus‐containing flame retardant. [ 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.…”

Designing Branched Deoxybenzoin Polyesters as Polymeric Flame Retardants

“…In recent years, polymers containing deoxybenzoin moieties have emerged as effective flame retardants, both as stand‐alone materials and in blends with commodity polymers . For example, previously reported deoxybenzoin‐containing polyesters exhibited high char yields (as high as 42%) by TGA and low heat release capacities <100 J g −1 K −1 , as determined by microscale combustion calorimetry (MCC) .…”

“…In recent years, polymers containing deoxybenzoin moieties have emerged as effective flame retardants, both as standalone materials and in blends with commodity polymers. 10,11 For example, previously reported deoxybenzoin-containing polyesters exhibited high char yields (as high as 42%) by TGA and low heat release capacities <100 J g −1 K −1 , as determined by microscale combustion calorimetry (MCC). 12 MCC, an oxygen consumption technique, allows milligram-scale testing of materials, producing heat release capacity (HRC) and total heat release (THR) data that serves as valuable precursors to larger scale flammability tests such as UL-94 and cone calorimetry.…”