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Influences of nanoclays on the flame retardancy of fiber-filled and unfilled polyamide-6 with and without aluminum diethylphosphinate
Date
2015-03-01
Author
Kaynak, Cevdet
Metadata
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The objective of this study was to investigate contribution of nanoclays to the flame retardancy of polyamide-6 and its 15 wt% short glass fiber-reinforced composite with and without an organophosphorus flame-retardant aluminum diethylphosphinate. Nanocomposites were compounded by melt mixing method via twin-screw extruder, and the specimens for testing and analyses were shaped by injection and compression molding. Transmission electron microscopy and x-ray diffraction analyses indicated that nanoclay layers had intercalated/exfoliated morphology in the polyamide-6 matrix. UL-94 vertical burning, limiting oxygen index, and mass loss cone calorimetry revealed that use of only 5 wt% nanoclays could improve many flammability parameters, such as peak heat release rate. Contribution of silicate layers was much more significant when 5 wt% nanoclays were used together with 15 wt% aluminum diethylphosphinate. Various analyses clarified that the basic flame retardancy mechanism of nanoclays was the formation of insulative barrier via tortuous pathway of silicate layers preventing the underlying polymer from heat and mass transfer during fire. It was also found that all the mechanical properties lost due to the use of aluminum diethylphosphinate could be compensated when its 5 wt% was replaced with nanoclays.
Subject Keywords
Nanoclays
,
Aluminum diethylphosphinate
,
Flame retardancy
,
Polyamide-6
,
Short glass fibers
URI
https://hdl.handle.net/11511/35354
Journal
JOURNAL OF FIRE SCIENCES
DOI
https://doi.org/10.1177/0734904114555961
Collections
Department of Metallurgical and Materials Engineering, Article
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The main objective of this dissertation was to investigate contribution of three different boron compounds and nanoclays to the flame retardancy of polyamide-6 and its 15 wt% short glass fiber reinforced composite with and without an organophosphorus flame retardant aluminum diethylphosphinate. All material combinations and nanocomposites were compounded by melt mixing method via twin-screw extruder and the specimens for testing and analyses were shaped by injection and compression molding. In the first par...
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In this study, the flame retardancy contribution of zinc borate when used together with a traditional flame retardant (aluminum diethylphosphinate compound) was investigated for neat polyamide-6 and for 15 wt% short glass fiber reinforced composite. Melt mixing with twin-screw extrusion was the compounding method while injection and compression molding were the shaping methods of specimens. Three different flammability tests (limiting oxygen index, UL-94 vertical burning, mass loss calorimetry) indicated th...
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C. Kaynak, “Influences of nanoclays on the flame retardancy of fiber-filled and unfilled polyamide-6 with and without aluminum diethylphosphinate,”
JOURNAL OF FIRE SCIENCES
, pp. 87–112, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35354.