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Materials 2017, 10(5), 467; doi:10.3390/ma10050467

Flame Retardancy of Carbon Fibre Reinforced Sorbitol Based Bioepoxy Composites with Phosphorus-Containing Additives

1
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest H-1111, Hungary
2
Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest H-1111, Hungary
*
Author to whom correspondence should be addressed.
Academic Editor: De-Yi Wang
Received: 5 April 2017 / Revised: 20 April 2017 / Accepted: 23 April 2017 / Published: 27 April 2017
(This article belongs to the Special Issue Flame Retardant Polymeric Materials)
View Full-Text   |   Download PDF [1797 KB, uploaded 27 April 2017]   |  

Abstract

Carbon fibre reinforced flame-retarded bioepoxy composites were prepared from commercially available sorbitol polyglycidyl ether (SPE) cured with cycloaliphatic amine hardener. Samples containing 1, 2, and 3% phosphorus (P) were prepared using additive type flame retardants (FRs) resorcinol bis(diphenyl phosphate) (RDP), ammonium polyphosphate (APP), and their combinations. The fire performance of the composites was investigated by limiting oxygen index (LOI), UL-94 tests, and mass loss calorimetry. The effect of FRs on the glass transition temperature, and storage modulus was evaluated by dynamic mechanical analysis (DMA), while the mechanical performance was investigated by tensile, bending, and interlaminar shear measurements, as well as by Charpy impact test. In formulations containing both FRs, the presence of RDP, acting mainly in gas phase, ensured balanced gas and solid-phase mechanism leading to best overall fire performance. APP advantageously compensated the plasticizing (storage modulus and glass transition temperature decreasing) effect of RDP in combined formulations; furthermore, it led to increased tensile strength and Charpy impact energy. View Full-Text
Keywords: carbon fibre reinforced bioepoxy composite; phosphorus-containing additive flame retardant; solid- and gas-phase mechanism; synergism carbon fibre reinforced bioepoxy composite; phosphorus-containing additive flame retardant; solid- and gas-phase mechanism; synergism
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MDPI and ACS Style

Toldy, A.; Niedermann, P.; Pomázi, Á.; Marosi, G.; Szolnoki, B. Flame Retardancy of Carbon Fibre Reinforced Sorbitol Based Bioepoxy Composites with Phosphorus-Containing Additives. Materials 2017, 10, 467.

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