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Novel Phosphalated Phosphazene: Research in Their Preparation and Properties

Author: BaiXuePing
Tutor: TangXiaoZhen
School: Shanghai Jiaotong University
Course: Materials Science
Keywords: Phosphate Phosphazene Thermal stability Flame retardant
CLC: O627.51
Type: Master's thesis
Year: 2008
Downloads: 57
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Abstract


This article is based on the basis of a large number of domestic and international published literature, combined with the cyclic phosphazene P atoms on the reactivity and phosphorus - nitrogen portfolio synergies and other particularity its special contribution on the flame retardant properties, with another commonly used flame retardant phosphate ester compounds, such as triphenyl phosphite, and itself has excellent flame retardant properties, and to combine the two by a chemical method. Expect to be able to overcome some of the deficiencies of these phosphate compounds, such as low temperature gasification inconvenience to the process, most of the phosphate compounds belong to the scope of small molecules, easy migration and other shortcomings. The integrated design of this paper a new class of esterified phosphorus nitrile compound. This thesis mainly includes the following two aspects: synthetic phosphate cyclotriphosphazene using the indirect method, 9,10 - dihydro-9 - oxa -10 - phosphaphenanthrene-10 - oxide ( DOPO) phosphate introduced by the above active H addition reaction with the aldehyde to the phosphazene system to prepare phosphate cyclotriphosphazene [N 3 P 3 (OC 6 H 4 ) CHOHPO (O) (C 6 H 4 ) 2 < / sub>] 6-n [OC 6 H 4 CHO] n THBDO, analysis of its chemical structure, test its thermal stability and by TGA. With the direct method of synthesis the cyclotriphosphazene phosphate, diphenyl phosphate ester by nucleophilic substitution reaction to introduce to the phosphazene system to produce a performance superior phosphation cyclotriphosphazene [N 3 P 3 (OP (O 2 Cl 2 ) H 8 ) 2 < / sub>) 2 (O 2 Cl 2 H 8 ) 2 ] DPPPz. And by a variety of analytical test methods such as NMR, elemental analysis identified the product structure directly prepared DPPPz accumulated a certain amount, to test its thermal stability and flame retardancy. The test results show that, DPPPz is a superior thermal stability and chemical products, the initial decomposition temperature of up to 330 ° C and in the PC system to show the excellent flame retardant properties, when added in an amount of 15% of UL-94 V -0-level testing. Was found in the process at the same time because of its good thermal stability, there is no large amount of white smoke as TPP, the flue gases generated in the process of flame test than TPP also significantly improved.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Elements in organic compounds > Section Ⅴ group elements, organic compounds ( nitrogen) > Phosphorus in organic compounds
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