Authors Brehme, S. ; Köppl, T. ; Schartel, B. ; Fischer, O. ; Altstädt, V. ; Pospiech, D. ; Döring, M.
Title Phosphorus polyester - an alternative to low-molecular-weight flame retardants in poly(butylene terephthalate)?
Date 23.11.2012
Number 33244
Abstract Pyrolysis, fire behaviour and mechanical properties of a blend of poly(butylene terephthalate) (PBT) with a phosphorus polyester (PET-P-DOPO) are investigated and compared with PBT/aluminium diethylphosphinate (AlPi-Et) composites. The PBT/PET-P-DOPO is immiscible and exhibits gas-phase and condensed-phase activity, whereas AlPi-Et in PBT results mainly in flame inhibition. Only higher loadings of AlPi-Et yield significant condensed-phase activity. Using the same phosphorus content, PBT/PET-P-DOPO and PBT/AlPi-Et exhibit similar reductions in fire load (22%) and flame spread (17% assessed by fire growth rate, FIGRA), compared with PBT. In contrast to AlPi-Et, the addition of PET-P-DOPO does not decrease the tensile strength of PBT. Thus, PET-P-DOPO is an interesting alternative to low-molecular-weight flame retardants.
Publisher Macromolecular Chemistry and Physics
Citation Macromolecular Chemistry and Physics 213 (2012) 2386-2397
Tags aluminium phosphinate blends 9 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide flame retardance polyesters reinforced poly(1 4-butylene terephthalate) cone calorimeter data epoxy-resins thermal-decomposition thermoplastic polyesters aluminum phosphinate

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