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Polymers 2016, 8(8), 289; doi:10.3390/polym8080289

Key Role of Reinforcing Structures in the Flame Retardant Performance of Self-Reinforced Polypropylene Composites

1
Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary
2
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary
3
Research Group for Composite Science and Technology, Hungarian Academy of Sciences, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary
*
Author to whom correspondence should be addressed.
Academic Editors: Abderrahim Boudenne and Paul Kiekens
Received: 30 June 2016 / Revised: 30 July 2016 / Accepted: 3 August 2016 / Published: 8 August 2016
(This article belongs to the Special Issue Recent Advances in Flame Retardancy of Textile Related Products)
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Abstract

The flame retardant synergism between highly stretched polymer fibres and intumescent flame retardant systems was investigated in self-reinforced polypropylene composites. It was found that the structure of reinforcement, such as degree of molecular orientation, fibre alignment and weave type, has a particular effect on the fire performance of the intumescent system. As little as 7.2 wt % additive content, one third of the amount needed in non-reinforced polypropylene matrix, was sufficient to reach a UL-94 V-0 rating. The best result was found in self-reinforced polypropylene composites reinforced with unidirectional fibres. In addition to the fire retardant performance, the mechanical properties were also evaluated. The maximum was found at optimal consolidation temperature, while the flame retardant additive in the matrix did not influence the mechanical performance up to the investigated 13 wt % concentration. View Full-Text
Keywords: self-reinforced polypropylene composite; flame retardancy; intumescence; polymer fibre; mechanical testing self-reinforced polypropylene composite; flame retardancy; intumescence; polymer fibre; mechanical testing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bocz, K.; Simon, D.; Bárány, T.; Marosi, G. Key Role of Reinforcing Structures in the Flame Retardant Performance of Self-Reinforced Polypropylene Composites. Polymers 2016, 8, 289.

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