Synthesis of a novel oligomeric intumescent flame retardant and its application in polypropylene

Song, Pingan ORCID: and Fang, Zhengping and Tong, Lifang and Xu, Zhongbin (2009) Synthesis of a novel oligomeric intumescent flame retardant and its application in polypropylene. Polymer Engineering and Science, 48 (7). pp. 1326-1331. ISSN 0032-3888


A novel oligomeric phosphorous-nitrogen containing intumescent flame retardant, poly (4,4-diamino diphenyl methane-O-bicycli pentaerythritol phosphate-phosphate) (PDBPP), was synthesized and characterized. Thermal stability and flammability properties of polypropylene (PP)/PDBPP composites with various PDBPP loading were investigated by thermogravimetric analysis (TGA), limited oxygen index (LOI), and cone calorimeter, respectively. The results showed that the incorporation of PDBPP could improve both the thermal stability and flame retardancy of PP considerably. PP/30%PDBPP system had a LOI value of 28 and its peak heat release rate was reduced by 60% relative to pure PP. Infrared spectrum and field emission scanning electron microscope measurements revealed that PDBPP and PP/PDBPP composites would form a continuous multicellular char layer containing phosphoric acid when exposed to elevated temperature. It was suggested that the very char layer was responsible for the enhanced thermal stability and improved flame retardancy.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 08 Aug 2019 00:52
Last Modified: 24 Nov 2021 00:34
Fields of Research (2008): 09 Engineering > 0999 Other Engineering > 099999 Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4099 Other engineering > 409999 Other engineering not elsewhere classified
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
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