Flame retardation and thermal degradation of flame-retarded polypropylene composites containing melamine phosphate and pentaerythritol phosphate

The melamine phosphate (MP) was synthesized from melamine and phosphate acid. Zinc oxide (ZnO) was used as a synergistic agent by adding into the MP during the synthesis process. The reaction products were characterized by Fourier transform infrared spectroscopy (FTIR). The properties of polypropylene (PP) composites containing intumescent flame retardant (IFR) additives of melamine phosphate and pentaerythritol (PER) were investigated by the limiting oxygen index (LOI), UL-94 vertical burning test, thermogravimetric analysis (TG) and scanning electron microscopy (SEM). The results indicated that the LOI value of the composites could be enhanced obviously with suitable content of ZnO. When the ZnO content was 6 wt% in MP, the LOI value reached 34.1%, which showed 10% higher than that of the composites without ZnO.

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Comparative study of thermal degradation and flame retardancy between straw flour and wood flour on wood–polypropylene composites

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705719869408 ◽

2019 ◽

pp. 089270571986940

Author(s):

Chuigen Guo ◽

Ran Chen ◽

Liping Li

Keyword(s):

Thermal Stability ◽

Thermal Degradation ◽

Heat Release ◽

Flame Retardancy ◽

Wood Flour ◽

Mass Loss Rate ◽

Synergetic Effect ◽

Polypropylene Composites ◽

Physical Integrity ◽

Pp Composites

The main aim of this study was to evaluate the thermal degradation and flame retardancy of straw flour (SF)-polypropylene (PP) composites and wood flour (WF)-PP composites. Biomass silica exists in SF, despite only 18 wt% loading of ammonium polyphosphate (APP); the APP in combination with biomass silica can effectively improve the flame retardancy on total heat release, heat release rate (HRR), mass loss rate, time to ignition (TTI), and limited oxygen index; it can obtain UL-94 V-0 rating, reduce the average and peak HRR by 44% and 41%, respectively, and increase the TTI by 8%. It attributes to the interaction effect between biomass silica in SF and APP, which more effectively enhances the thermal stability of the SF/PP/APP composites at high temperature and increases the char residue. The silica could form an intercalated network in char structure and then boost the physical integrity. The enhanced physical integrity and thermal stability lead to an effectively synergetic effect on flame retardancy of SF/PP/APP composites.

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Thermal degradation and intumescent flame retardation of cellulose whisker/epoxy resin composite

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-011-1380-5 ◽

2011 ◽

Vol 104 (3) ◽

pp. 1083-1090 ◽

Cited By ~ 27

Author(s):

Kun Wu ◽

Min-Min Shen ◽

Yuan Hu ◽

Weiyi Xing ◽

Xin Wang

Keyword(s):

Thermal Degradation ◽

Epoxy Resin ◽

Resin Composite ◽

Epoxy Resin Composite ◽

Flame Retardation ◽

Cellulose Whisker ◽

Intumescent Flame Retardation

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Thermal Degradation Behavior of Polypropylene and Ethylene Vinyl Acetate Copolymer Treated with Intumescent Flame Retardants Containing Caged Bicyclic Phosphates

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.936.17 ◽

2014 ◽

Vol 936 ◽

pp. 17-22

Author(s):

Xin Li ◽

Yu Xiang Ou

Keyword(s):

Thermal Degradation ◽

Vinyl Acetate ◽

Flame Retardants ◽

Ethylene Vinyl Acetate ◽

Formation Mechanisms ◽

Thermal Degradation Behavior ◽

Flame Retarded ◽

Intumescent Flame Retardants ◽

Acetate Copolymer ◽

Ethylene Vinyl Acetate Copolymer

Polypropylene (PP) and ethylene vinyl acetate copolymer (EVA) were treated with intumescent flame retardants containing caged bicyclic phosphates. The behavior of thermal degradation of the flame-retarded PP and EVA were studied by TG, DSC, and the FTIR spectra of PP’s residues at different temperature were recorded. In addition, the possible thermal degradation and char formation mechanisms were analyzed and discussed.

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