- Aluminum-organophosphorus hybrid nanorods for simultaneously enhancing the flame retardancy and mechanical properties of epoxy resin
-
New aluminum-organophosphorus hybrid nanorods (AOPH-NR) have been prepared by reacting aluminum hydroxide (ATH) with dibenzylphosphinic acid (DBPA) with aluminum hydroxide (ATH) and used to prepare nanocomposites with epoxy resin. In order to determine the structure-property relationship of these composites, several other phosphinic acids of the general formula (R(CH2) n)2POOH (R = ester, allyl, nitrile, n = 1 or 2), and corresponding AOPHs were synthesized. FTIR, Raman, TGA, and XRD examinations showed that only AOPH-NR possesses a highly hybrid structure and high thermostability. SEM and TEM confirmed the nanorod morphology of AOPH-NR. The formation mechanism can be described as a decomposing-reforming process. This characteristic causes AOPH-NR to exhibit superior properties. Limiting oxygen index (LOI) determination and cone calorimeter analysis showed that the incorporation of only 4.25 wt% AOPH-NR remarkably improved the LOI value to as much as 28.0 and led to a 23% reduction in peak heat release rate (PHRR). Dynamic mechanical analysis (DMA) indicated that the mechanical properties of epoxy resin were also improved by incorporating AOPH-NR. In this way, the aluminum-organophosphorus hybridization via reacting ATH with specific organophosphinic acids shows promise as a means of improving flame retardancy and mechanical properties simultaneously. The thermal and anti-flaming properties of composites, combined with the properties of AOPHs, allowed us to discover the important role that the release and migration of phosphorus species plays in fire-retarding materials. This provides a new insight into the design of high-performance flame retardants.
- Jiajun, Ma,Junxiao, Yang,Yawen, Huang,Ke, Cao
-
-
Read Online
- Double Arbuzov Reaction. Synthesis of Bis(ω-cyanoalkyl)phosphinic Acids
-
A general method for the synthesis of symmetric bis(ω-cyanoalkyl)phosphinic acids from ammonium hypophosphite was proposed. The reaction of bis(trimethylsilyl)hypophosphite generated in situ with the ω-bromoalkylnitrile molecule according to the Arbuzov r
- Ragulin
-
-
Read Online
- ORGANIC PHOSPHORUS COMPOUNDS 101. PREPARATION AND PHYSICAL PROPERTIES OF BIS(AMINOALKYL)PHOSPHINIC ACIDS
-
The synthesis, physical and spectroscopic properties of 3-aminopropyl-aminomethylphosphinic acid, 5, bis(2-aminoethyl)phosphinic acid, 8, and of bis(3-aminopropyl)phosphinic acid, 10, are reported. Key words: 3-Aminopropyl-aminomethylphosphinic acid; bis(
- Maier, Ludwig
-
-