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Synthesis and characterization of aryl diphosphonates
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November 2011Speciality Petrochemicals 28(6):55-58 By: Shi, Hongli; Luo, Xuan; Huang, Xiaodong; Yang, Jinfei; Zhi, Huizhen Tetra-Et 1,4-phenylenebis(methylene) diphosphonate, a new kind of flame retardant which is highly efficient and halogen-free, was synthesized through tri-Et phosphate and dichlorobenzyl chloride with a catalyst in the reaction. The optimal synthesis conditions were: n(tri-Et phosphate):n(dichlorobenzyl chloride) = 3.0:1, at 140°C for 6 h, using 1% catalyst of the mass. The yield under these conditions was up to 85%. Tetra-Et 1,4-phenylenebis(methylene) diphosphonate was characterized by ESI-MS, IR and 1H NMR. The thermal stability of tetra-Et 1,4-phenylenebis(methylene) diphosphonate was researched by TGA. Keywords: aryl diphosphonate synthesis catalyst flame retardant thermal decomposition |
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(2025-6-4)
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