Surface modification of ammonium polyphosphate by supramolecular assembly for enhancing fire safety properties of polypropylene

2020 ◽  
Vol 181 ◽  
pp. 107588 ◽  
Author(s):  
Yaru Sun ◽  
Bihe Yuan ◽  
Sheng Shang ◽  
Hongming Zhang ◽  
Yongqian Shi ◽  
...  
Keyword(s):  
Surface Modification ◽  
Fire Safety ◽  
Supramolecular Assembly ◽  
Ammonium Polyphosphate ◽  
Safety Properties

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

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2761
Author(s):  
Yingtong Pan ◽  
Zhonglin Luo ◽  
Biaobing Wang
Keyword(s):  
Fire Safety ◽  
Self Assembly ◽  
Raw Materials ◽  
Ammonium Polyphosphate ◽  
Ionic Exchange ◽  
Safety Properties ◽  
Cone Calorimetry ◽  
Pyrolysis Gas ◽  
Gas Source ◽  
Carbon Acid

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.

scholarly journals Effect of Functionalized Carbon Microspheres Combined with Ammonium Polyphosphate on Fire Safety Performance of Thermoplastic Polyurethane

ACS Omega ◽  
2020 ◽  
Vol 5 (11) ◽  
pp. 6051-6061 ◽  
Author(s):  
Xilei Chen ◽  
Yongxing Lai ◽  
Yuanxiang Gu ◽  
Chuanmei Jiao ◽  
Shaoxiang Li
Keyword(s):  
Fire Safety ◽  
Thermoplastic Polyurethane ◽  
Safety Performance ◽  
Ammonium Polyphosphate ◽  
Carbon Microspheres

Surface Modification of Cellulose Fiber via Supramolecular Assembly of Biodegradable Polyesters by the Aid of Host−Guest Inclusion Complexation

2010 ◽  
Vol 11 (5) ◽  
pp. 1364-1369 ◽  
Author(s):  
Qiang Zhao ◽  
Shufang Wang ◽  
Xinjian Cheng ◽  
Richard C. M. Yam ◽  
Deling Kong ◽  
...  
Keyword(s):  
Surface Modification ◽  
Inclusion Complexation ◽  
Supramolecular Assembly ◽  
Cellulose Fiber ◽  
Biodegradable Polyesters

scholarly journals Preparation of Mn2+ Doped Piperazine Phosphate as a Char-Forming Agent for Improving the Fire Safety of Polypropylene/Ammonium Polyphosphate Composites

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7589
Author(s):  
Fuqiang Dong ◽  
Zhonglin Luo ◽  
Biaobing Wang
Keyword(s):  
Heat Release ◽  
Flame Retardant ◽  
Fire Safety ◽  
Raw Materials ◽  
Carbon Layer ◽  
Ammonium Polyphosphate ◽  
Manganese Acetate ◽  
Limiting Oxygen Index ◽  
Peak Heat Release Rate ◽  
High Degree

A piperazine phosphate doped with Mn2+ (HP-Mn), as a new char-forming agent for intumescent flame retardant systems (IFR), was designed and synthesized using 1-hydroxy ethylidene-1,1-diphosphonic acid, piperazine, and manganese acetate tetrahydrate as raw materials. The effect of HP-Mn and ammonium polyphosphate (APP) on the fire safety and thermal stability of polypropylene (PP) was investigated. The results showed that the combined incorporation of 25 wt.% APP/HP-Mn at a ratio of 1:1 endowed the flame retardant PP (PP6) composite with the limiting oxygen index (LOI) of 30.7% and UL-94 V-0 rating. In comparison with the pure PP, the peak heat release rate (PHRR), the total heat release (THR), and the smoke production rate (PSPR) of the PP6 were reduced by 74%, 30%, and 70%, respectively. SEM and Raman analysis of the char residues demonstrated that the Mn2+ displayed a catalytic cross-linking charring ability to form a continuous and compact carbon layer with a high degree of graphitization, which can effectively improve the flame retardancy of PP/APP composites. A possible flame-retardant mechanism was proposed to reveal the synergistic effect between APP and HP-Mn.

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