Preparation and Characterization of Flame-Retarded Poly(butylene terephthalate)/Poly(ethylene terephthalate) Blends: Effect of Content and Type of Flame Retardant

Abstract

A flame retardant named TAD was synthesized by the reaction of 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and triallyl isocyanurate at first. Then, novel flameretarded materials based on PBT and PET resin were formulated via melt blending with TAD, expandable graphite (EG), and a mixture of both. The effect of flame retardant type and TAD content on the flame behavior of PBT/PET blend was carefully investigated. TAD contributed towards higher LOI value and better UL-94 performance than EG. However, the best V-0 rating in the UL-94 test was achieved by the incorporation of TAD/EG mixture into the resin matrix. TAD/EG combination exhibited clear synergistic effect on both reducing the flaming intensity and increasing the residual char layer, as confirmed by cone calorimeter tests and TGA results. SEM images combined with XPS analysis revealed that expansion and migration of EG locked the P-containing radicals from decomposing TAD into the condensed phase, which led to the formation of compact and continuous char layers. All the results in our studies demonstrate that incorporation of TAD with a charring agent EG is an effective and promising technique to develop flame-retarded PBT/PET material, which has high potential for applications in the areas of electronic devices, household products, and automotive parts.

Tribology of Polymer Blends PBT + PTFE

“…Materials based on blends PBT + PET with flame retardant agents (a new formulated agent, expandable graphite, added separately or in a mixture of both) were tested for determining the influence of flame retardant [9]. The mixture of flame retardant agents exhibited synergistic effect in reducing the flaming intensity and increasing the residual char layer, SEM images and XPS analysis revealed an expansion and migration of EG locked the P-containing radicals from decomposing the new formulated flame retardant into the condensed phase, which led to the formation of compact and continuous char layers.…”

Reduced graphene oxide reinforced PET/PBT nanocomposites: Compatibilization and characterization

“…17,[21][22][23] So, PET/PBT blends have received considerable interest and studied extensively before. 17,18,[21][22][23][24][25][26][27][28] Amramova reported that PET and PBT exhibited single glass transition temperature, so PET/PBT miscible blend in amorphous phase. 24 Besides, PBT enhances the crystallization behavior of PET while mechanical properties of pure polymers can be improved with blending.…”

“…In addition, its solvent resistance, dimensional stability makes it attractive for automotive, electronic applications. The blending of PET and PBT is a useful route to obtain the improved combination of outstanding properties of these polymers 17,21‐23 . So, PET/PBT blends have received considerable interest and studied extensively before 17,18,21‐28 .…”

“…The blending of PET and PBT is a useful route to obtain the improved combination of outstanding properties of these polymers 17,21‐23 . So, PET/PBT blends have received considerable interest and studied extensively before 17,18,21‐28 . Amramova reported that PET and PBT exhibited single glass transition temperature, so PET/PBT miscible blend in amorphous phase 24 .…”

Particle Size Related Effects of Multi-Component Flame-Retardant Systems in poly(butadiene terephthalate)

“…Aluminum tris-(diethylphosphinate) (AlPi) has generally been proven in multiple studies to be efficient flame inhibitors for both reinforced [ 11 , 12 ] and neat polyesters [ 13 , 14 , 15 ]. They act through the formation of a carbon layer as well as through the chemical neutralization of radicals in the gas phase.…”