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Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation.
Polymers (Basel). 2018 Dec 30; 11(1)P

Abstract

Starch, being a polyhydric compound with its natural charring ability, is an ideal candidate to serve as a carbonization agent in an intumescent system. This charring ability of starch, if accompanied by an acidic source, can generate an effective intumescent flame retardant (IFR) system, but the performance of starch-based composites in an IFR system has not been tested in detail. Here, we describe a PLA-based IFR system consisting of ammonium polyphosphate (APP) as acidic source and cornstarch as carbon source. We prepared different formulations by melt compounding followed by molding into sheets by hot pressing. The thermal behavior and surface morphology of the composites was investigated by thermogravimetric analysis and scanning electron microscopy respectively. We also conducted limiting oxygen index (LOI), UL-94, and cone calorimetry tests to characterize the flame-retardant properties. Cone calorimetry revealed a 66% reduction in the peak heat release rate of the IFR composites compared to pure PLA and indicated the development of an intumescent structure by leaving a residual mass of 43% relative to the initial mass of the sample. A mechanism of char formation has also been discussed in detail.

Authors+Show Affiliations

Faculty of Science and Engineering, Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands. muhammad.maqsood@maastrichtuniversity.nl.Faculty of Science and Engineering, Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands. gunnar.seide@maastrichtuniversity.nl.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30960033

Citation

Maqsood, Muhammad, and Gunnar Seide. "Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation." Polymers, vol. 11, no. 1, 2018.
Maqsood M, Seide G. Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation. Polymers (Basel). 2018;11(1).
Maqsood, M., & Seide, G. (2018). Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation. Polymers, 11(1). https://doi.org/10.3390/polym11010048
Maqsood M, Seide G. Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation. Polymers (Basel). 2018 Dec 30;11(1) PubMed PMID: 30960033.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation. AU - Maqsood,Muhammad, AU - Seide,Gunnar, Y1 - 2018/12/30/ PY - 2018/11/20/received PY - 2018/12/21/revised PY - 2018/12/24/accepted PY - 2019/4/10/entrez PY - 2019/4/10/pubmed PY - 2019/4/10/medline KW - biopolymer composites KW - carbonization agent KW - char formation KW - flame retardancy KW - thermal analysis JF - Polymers JO - Polymers (Basel) VL - 11 IS - 1 N2 - Starch, being a polyhydric compound with its natural charring ability, is an ideal candidate to serve as a carbonization agent in an intumescent system. This charring ability of starch, if accompanied by an acidic source, can generate an effective intumescent flame retardant (IFR) system, but the performance of starch-based composites in an IFR system has not been tested in detail. Here, we describe a PLA-based IFR system consisting of ammonium polyphosphate (APP) as acidic source and cornstarch as carbon source. We prepared different formulations by melt compounding followed by molding into sheets by hot pressing. The thermal behavior and surface morphology of the composites was investigated by thermogravimetric analysis and scanning electron microscopy respectively. We also conducted limiting oxygen index (LOI), UL-94, and cone calorimetry tests to characterize the flame-retardant properties. Cone calorimetry revealed a 66% reduction in the peak heat release rate of the IFR composites compared to pure PLA and indicated the development of an intumescent structure by leaving a residual mass of 43% relative to the initial mass of the sample. A mechanism of char formation has also been discussed in detail. SN - 2073-4360 UR - https://www.unboundmedicine.com/medline/citation/30960033/Investigation_of_the_Flammability_and_Thermal_Stability_of_Halogen_Free_Intumescent_System_in_Biopolymer_Composites_Containing_Biobased_Carbonization_Agent_and_Mechanism_of_Their_Char_Formation_ L2 - http://www.mdpi.com/resolver?pii=polym11010048 DB - PRIME DP - Unbound Medicine ER -
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