Synergistic Effect between a Novel Char Forming Agent and Ammonium Polyphosphate on Flame Retardancy and Thermal Properties of Polypropylene

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• 作者：Nana Tian ; Xin Wen ; Zhiwei Jiang ; Jiang Gong ; Yanhui Wang ; Jian Xue ; Tao Tang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：August 14, 2013
• 年：2013
• 卷：52
• 期：32
• 页码：10905-10915
• 全文大小：976K
• 年卷期：v.52,no.32(August 14, 2013)
• ISSN：1520-5045

文摘

The performances of a novel char forming agent containing spiro and caged bicyclic phosphate (SBCPO) and its mixture with ammonium polyphosphate (APP) were investigated. The flame retardancy of the polypropylene (PP)/SBCPO/APP system was evaluated by the limiting oxygen index (LOI), the UL-94 test, and the cone calorimeter test. The maximum LOI value of PP/intumescent flame retardant (IFR) could reach 30.5 and passed the UL-94 V-0 rating. An obvious synergistic effect could be observed between SBCPO and APP by TGA, DSC, and synergistic effectivity studies, which remarkably improved the flame retardant properties of PP. FTIR analysis indicated that APP could accelerate the decomposition of SBCPO due to the interaction between them. The thermal degradation kinetics results of the PP/IFR system by the Kissinger method and the Flynn鈥揥all鈥揙zawa method showed that the apparent activation energy (E_a) increased with the increase of content for flame retardants.