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Cross-Linking Modification of Ammonium Polyphosphate via Ionic Exchange and Self-Assembly for Enhancing the Fire Safety Properties of Polypropylene

Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
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Polymers 2020, 12(11), 2761; https://doi.org/10.3390/polym12112761
Received: 27 October 2020 / Revised: 16 November 2020 / Accepted: 20 November 2020 / Published: 23 November 2020
(This article belongs to the Section Polymer Chemistry)
Modified ammonium polyphosphate (MAPP) was prepared as a novel mono-component intumescent flame retardant (IFR) via the ionic exchange between ammonium polyphosphate (APP) and piperazine sulfonate, which is synthesized by self-assembly using 1-(2-aminoethyl) piperazine (AEP) and p-aminobenzene sulfonic acid (ASC) as raw materials. This all-in-one IFR integrating three functional elements (carbon, acid, and gas source) showed more efficient flame retardancy and excellent smoke suppression as well as better mechanical properties than the conventional APP. The incorporation of 22.5 wt.% MAPP into polypropylene (PP) eliminated the melt dripping phenomenon and passed the UL-94 V-0 rating. The results of the cone calorimetry test (CCT) revealed that the release of heat, smoke, and CO is significantly decreased, demonstrating that this novel IFR endows PP with excellent fire safety more effectively. For PP/MAPP composites, a possible IFR mechanism was proposed based on the analysis of the pyrolysis gas and char residues. View Full-Text
Keywords: ionic exchange; self-assembly; modified ammonium polyphosphate; polypropylene; combustion behavior ionic exchange; self-assembly; modified ammonium polyphosphate; polypropylene; combustion behavior
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MDPI and ACS Style

Pan, Y.; Luo, Z.; Wang, B. Cross-Linking Modification of Ammonium Polyphosphate via Ionic Exchange and Self-Assembly for Enhancing the Fire Safety Properties of Polypropylene. Polymers 2020, 12, 2761. https://doi.org/10.3390/polym12112761

AMA Style

Pan Y, Luo Z, Wang B. Cross-Linking Modification of Ammonium Polyphosphate via Ionic Exchange and Self-Assembly for Enhancing the Fire Safety Properties of Polypropylene. Polymers. 2020; 12(11):2761. https://doi.org/10.3390/polym12112761

Chicago/Turabian Style

Pan, Yingtong; Luo, Zhonglin; Wang, Biaobing. 2020. "Cross-Linking Modification of Ammonium Polyphosphate via Ionic Exchange and Self-Assembly for Enhancing the Fire Safety Properties of Polypropylene" Polymers 12, no. 11: 2761. https://doi.org/10.3390/polym12112761

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