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Polymers 2017, 9(9), 407;

Preparation and Flame Retardance of Polyurethane Composites Containing Microencapsulated Melamine Polyphosphate

Department of Ammunition Engineering and Explosion Technology, Anhui University of Science and Technology, Huainan 232001, China
Department of Food and Beverage Management, Far East University, Tainan City 74448, Taiwan
Department of Chemical and Materials Engineering, Southern Taiwan University of Science and Technology, Tainan City 71005, Taiwan
Green Flame Retardant Material Research Laboratory, Department of Safety, Health and Environmental Engineering, Hung-Kuang University, Taichung City 43302, Taiwan
Author to whom correspondence should be addressed.
Received: 13 July 2017 / Revised: 21 August 2017 / Accepted: 29 August 2017 / Published: 31 August 2017
(This article belongs to the Special Issue Processing-Structure-Properties Relationships in Polymers)
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A new microencapsulated flame retardant containing melamine polyphosphate (MPP) and 4,4′-oxydianiline-formaldehyde (OF) resin as the core and shell materials, respectively, was synthesized by in situ polymerization. 29Si NMR was used to measure the condensation density of polyurethane containing silicon compound (Si-PU). The structures and properties of the microencapsulated melamine polyphosphate (OFMPP) were characterized using X-ray photoelectron spectroscopy, scanning electron microscopy and water solubility. Thermal behavior of the OFMPP was systematically analyzed through thermogravimetric analysis. Flame retardance tests such as the limiting oxygen index and UL-94 were employed to evaluate the effect of composition variation on the MPP and OFMPP in polyurethane composites. The results indicated that the microencapsulation of MPP with the OF resin improved hydrophobicity and that the flame retardance of the Si-PU/OFMPP composite (limiting oxygen index, LOI = 32%) was higher than that of the Si-PU/MPP composite (LOI = 27%) at the same additive loading (30 wt %). View Full-Text
Keywords: microencapsulation; melamine polyphosphate; polyurethane; composite; flame retardant microencapsulation; melamine polyphosphate; polyurethane; composite; flame retardant

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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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Liu, S.-H.; Kuan, C.-F.; Kuan, H.-C.; Shen, M.-Y.; Yang, J.-M.; Chiang, C.-L. Preparation and Flame Retardance of Polyurethane Composites Containing Microencapsulated Melamine Polyphosphate. Polymers 2017, 9, 407.

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