The effect of expanded graphite/clay nanoparticles on thermal, rheological, and fire‐retardant properties of poly(butylene succinate)

Teboho Clement Mokhena; Emmanuel Rotimi Sadiku; Suprakas Sinha Ray; Mokgaotsa Jonas Mochane; Tshwafo Elias Motaung

doi:10.1002/pc.26304

journal article·2021-12

The effect of expanded graphite/clay nanoparticles on thermal, rheological, and fire‐retardant properties of poly(butylene succinate)

Teboho Clement Mokhena, Emmanuel Rotimi Sadiku, Suprakas Sinha Ray, Mokgaotsa Jonas Mochane, Tshwafo Elias Motaung

Polymer Composites· Volume 42· Issue 12

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Source abstract

Abstract

Abstract In this study, the effect of clay nanoparticles on the flame retardancy, thermal stability, thermal degradation kinetics and rheological properties of poly(butylene succinate) (PBS)/expanded graphite (EG) composites were investigated. The composites were prepared by melt blending, followed by melt compression. The results indicated that the presence of clay, improved the dispersion of the EG, as confirmed by exhibited significant increases in the rheological properties (storage modulus (G′), loss modulus (G″) and complex viscosity (η)) when compared to the pristine PBS. The presence of Cloisite 15 A organoclay, however, decreased the overall thermal stability of the composite material, due to its catalytic effect. The degradation kinetics revealed that the presence of EG can impede the clay's catalytic effect on the degradation process of PBS. Based on the comparison between PBS and PBS/EG composites, the flame retardancy improved after the addition of clay due to formation of char, which acted as barrier layer against heat, oxygen, and flammable gases.

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Research context

Nanomaterials Composites Catalysis & surfaces

OpenAlex topics: Flame retardant materials and properties · biodegradable polymer synthesis and properties · Polymer Nanocomposites and Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of NanoEngineering Research (INER) and Department of Chemical Metallurgical and Materials Engineering Tshwane University of Technology Pretoria South Africa

DSI‐Nanotechnology Innovation Centre, Advanced Materials Division, Mintek Randburg South Africa

Centre for Nanostructures and Advanced Materials, DSI‐CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research Pretoria South Africa

Department of Chemical Sciences University of Johannesburg Johannesburg South Africa

Department of Life Sciences Central University of Technology Bloemfontein South Africa

Department of Chemistry Sefako Makgatho Health Science University Medunsa South Africa

Department of Chemistry School of Science in the College of Science Engineering and Technology, University of South Africa City of Tshwane South Africa

Funding

National Research Foundation

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