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Fire response of polyamide 6 with layered and fibrillar nanofillers |
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| Authors: | Guipeng Cai Aravind Dasari Zhong-Zhen Yu Shaocong Dai Jiyang Wang |
| Institution: | a Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering (J07), The University of Sydney, Sydney, NSW 2006, Australia b State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, PR China c Madrid Institute for Advanced Studies of Materials (IMDEA Materials), C/Profesor Aranguren s/n, 28040 Madrid, Spain d Beijing Key Laboratory on Preparation and Processing of Novel Polymeric Materials, Department of Polymer Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China |
| Abstract: | To improve the fire retardancy performance of polyamide 6 (PA 6), layered silicates are used in combination with multi-walled carbon nanotubes (CNTs) to address the issue of packing density and uniformity of the protective inorganic barrier formed at the burning surface of the nanocomposites during combustion. Benzimidazolium is used to modify the silicate layers instead of conventional alkyl ammonium surfactants to tackle the issue of thermal stability. However, the poor dispersion of the modified layered silicates in PA 6 has a significant negative effect on the fire performance of the materials and offsets the positive effect of CNTs. Also, the results point to the apparent contradictions with different fire exposure tests; that is, significant reductions in heat release and mass loss rates in the cone calorimetry test do not imply a higher rating in the UL 94 vertical burning test. |
| Keywords: | Flame retardancy Polyamide Carbon nanotubes Clay Nanocomposites |
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