Thermal degradation behavior of hyperbranched polyphosphate acrylate/tri(acryloyloxyethyl) phosphate as an intumescent flame retardant system

The hyperbranched polyphosphate acrylate (HPPA) was blended in different ratios with tri(acryloyloxyethyl) phosphate (TAEP) to obtain a series of UV curable intumescent flame retardant resins. The thermal degradation mechanism of their cured films in air was studied by thermogravimetric analysis and...

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Bibliographic Details
Published in:Polymer degradation and stability 2007-07, Vol.92 (7), p.1193-1198
Main Authors: Huang, Zhanguang, Shi, Wenfang
Format: Article
Language:English
Subjects:
Applied sciences
Compounding ingredients
Exact sciences and technology
Fireproof agents
Flame retardance
Hyperbranched
Inorganic and organomineral polymers
Intumescence
Phosphate
Physicochemistry of polymers
Polymer industry, paints, wood
Properties and characterization
Technology of polymers
UV curing
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Summary:The hyperbranched polyphosphate acrylate (HPPA) was blended in different ratios with tri(acryloyloxyethyl) phosphate (TAEP) to obtain a series of UV curable intumescent flame retardant resins. The thermal degradation mechanism of their cured films in air was studied by thermogravimetric analysis and in situ Fourier-transform infrared spectroscopy. The results showed that the addition of HPPA reduced the initial decomposition temperature ( T di) but increased the char residue. Moreover, the decomposition was considered to be divided into three stages: firstly the degradation of phosphate group, secondly ester group and finally alkyl chain. The morphological structure of the formed char was observed by scanning electron microscopy, demonstrating the formation mechanism of the intumescent charred crust.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2007.04.008