Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Version 1 : Received: 27 October 2020 / Approved: 28 October 2020 / Online: 28 October 2020 (10:06:57 CET)

A peer-reviewed article of this Preprint also exists.

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. 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.

Journal reference: Polymers 2020, 12, 2761
DOI: 10.3390/polym12112761

Abstract

Modified ammonium polyphosphate (MAPP) as a novel mono-component intumescent flame retardant (IFR) was prepared via the ionic exchange between ammonium polyphosphate (APP) and piperazine sulfonate, which is synthesized by self-assembly using 1-(2-Amioethyl) piperazine (AEP) and p-amino benzene 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.

Subject Areas

ionic exchange; self-assembly; modified ammonium polyphosphate; polypropylene; combustion behavior

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