Title Pyrolysis study of a phosphorus-containing aliphatic-aromatic polyester and ist nanocomposites with layered silicates
Date 01.01.2009
Number 16262
Abstract This paper deals with the thermal decomposition behaviour of a new fire retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-containing aliphatic-aromatic polyester and its nanocomposites with natural layered silicate (montmorillonite) under inert atmosphere studied by TGA-FTIR, Pyrolysis-GC/MS of volatile products and ATR-FTIR of non-volatile decomposition products. The phosphorus-containing polyester undergoes decomposition in two steps between 340 – 516 °C. The first step is associated with the release of carbon dioxide, acetaldehyde, ethene, acid-containing products (mainly benzoic acid) resulting in the formation of polyarylates followed by their decomposition in the second step with the evolution of carbon dioxide. DOPO-containing products, esters (mainly diethenyl terephthalate), carbon monoxide, acids and water are released through both stages. At the end of decomposition polyaromatic structures, diarylketones and organophosphorus esters built<br />into the chemical structure of the char develop in the solid residue. The modification of the polyester with a layered silicate does not change the composition of the pyrolysis products, only their yield, and tended to diminish the charring of the polymer. A thermal decomposition scheme of the P-polyester is proposed and the mass spectra of some DOPO-containing products are discussed.
Publisher Polymer Degradation and Stability
Identifier 23
Citation Polymer Degradation and Stability 94 (2009) 355-364
Authors Balabanovich, A. ; Pospiech, D. ; Korwitz, A. ; Häußler, L. ; Harnisch, C.
Tags polyester nanocomposites thermal decomposition halogen-free flame retardancy ftir pyrolysis-gc/ms thermal-degradation poly(ethylene terephthalate) poly(butylene terephthalate) containing molecules methacrylate polymers poly(ethylene-terephthalate) copolye

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