1067-12-5Relevant articles and documents
Filipescu et al.
, p. 821 (1963)
Study on thermal degradation and combustion behavior of flame retardant unsaturated polyester resin modified with a reactive phosphorus containing monomer
Lin, Ying,Yu, Bin,Jin, Xin,Song, Lei,Hu, Yuan
, p. 49633 - 49642 (2016)
A halogen-free phosphorus-containing monomer (TAOPO) with a P-C bond was successfully synthesized and used as a co-curing agent to prepare intrinsic flame-retardant unsaturated polyester resin (FR-UPR) by radical bulk polymerization with different TAOPO content. The thermal degradation and flame retardancy of pure UPR and FR-UPR were investigated by thermogravimetric analysis (TGA), cone calorimetry tests and limiting oxygen index (LOI). As the phosphorus content increased to 3%, FR-UPR (URP-3) showed a lower peak heat release rate (PHRR) and total heat release (THR), reducing by 45.7% and 45.5% those of pure UPR, while the LOI value and char residue increased markedly. Besides, thermal-oxidative degradation behaviors of different UPR samples were characterized by real-time infrared spectrometry (RT-IR) and thermogravimetry-Fourier transform infrared (TG-FTIR) spectroscopy, revealing the degradation mechanism. Furthermore, the residual char of UPRs was investigated by scanning electron microscopy (SEM) and Raman spectroscopy. The results indicated that the incorporation of TAOPO into UPR could effectively prompt the UP matrix to form a more compact char layer which acted as a protective barrier to reduce heat release during combustion.
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Grayson,M.
, p. 79 - 83 (1963)
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Phosphorus-containing polymers from tetrakis-(hydroxymethyl)phosphonium sulfate iii. A new hydrolysis-resistant tris(allyloxymethyl)phosphine oxide and its thiol-ene reaction under ultraviolet irradiation
Tan, Zhiwei,Wu, Chengyan,Zhang, Min,Lv, Wenzhong,Qiu, Jinjun,Liu, Chengmei
, p. 41705 - 41713 (2014)
Two kinds of new phosphorus-containing crosslinked polymer materials were prepared via thiol-ene photopolymerization and their properties were studied. In order to prepare these crosslinked polymer materials, multifunctional monomer tris(allyloxymethyl)phosphine oxide (TAOPO) was synthesized from an eco-friendly raw material, tetrakis(hydroxymethyl) phosphonium sulfate (THPS). Crosslinked poly(phosphine oxide) networks were then produced by a thiol-ene reaction in which TAOPO reacts with the two kinds of polythiol under ultraviolet (UV) irradiation. The new crosslinked polymers possess long-term hydrolysis-resistance property because the monomer TAOPO contains a phosphorus-carbon bond. The crosslinked polymers have a high gel content, high dielectric constant, low dielectric loss, and excellent transparency with a high refractive index and high Abbe number. DMA and TGA results indicated that all cured poly(phosphine oxide) were uniform networks and exhibited a high thermal stability. This journal is
STABLE MODIFIED POLYMER POLYOL DISPERSIONS
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Paragraph 0340-0341; 0352-0353, (2021/06/26)
The present invention relates to new stable modified polymer polyol dispersions. The modified polymer polyols of the present invention comprise at least one polyol and a stable dispersion of polymeric particles in the at least one polyol. There are also disclosed processes for the preparation of the herein described modified polymer polyols, and processes for preparing polyurethane materials containing them.
Synthesis of monophosphines directly from white phosphorus
Scott, Daniel J.,Cammarata, Jose,Schimpf, Maximilian,Wolf, Robert
, p. 458 - 464 (2021/04/09)
Monophosphorus compounds are of enormous industrial importance due to the crucial roles they play in applications such as pharmaceuticals, photoinitiators and ligands for catalysis, among many others. White phosphorus (P4) is the key starting material for the preparation of all such chemicals. However, current production depends on indirect and inefficient, multi-step procedures. Here, we report a simple, effective ‘one-pot’ synthesis of a wide range of organic and inorganic monophosphorus species directly from P4. Reduction of P4 using tri-n-butyltin hydride and subsequent treatment with various electrophiles affords compounds that are of key importance for the chemical industry, and it requires only mild conditions and inexpensive, easily handled reagents. Crucially, we also demonstrate facile and efficient recycling and ultimately catalytic use of the tributyltin reagent, thereby avoiding the formation of substantial Sn-containing waste. Accessible, industrially relevant products include the fumigant PH3, the reducing agent hypophosphorous acid and the flame-retardant precursor tetrakis(hydroxymethyl)phosphonium chloride. [Figure not available: see fulltext.]
