Send a Message

Contact Us

Company Address

Zhengzhou, China.

Studies of the effects of phosphorus-nitrogen-bromine

Jan 01, 1991 The effects of the bromine compound used (DBB) have not been discussed at length in this paper, because they are well known and have been con- sidered already [e.g. 2, 15]. The focus of this work was the effect of nitrogen and phosphorus compounds, and DBB was simply used as a base substrate, in combination with the polymers.

Effect of Phosphorus and Bromine on Burning Rates for

The in iluence of burning mode, i.e., horizontal or top-vertical, on the rate of burning, and effects of bromine and phosphorus on oxygen sensitivity were observed. Low levels of added retardant enhance burning rates under all conditions for horizontal burning. Similarly, oxygen sensitivity is greater for samples treated with either retardant

Science made alive: Chemistry/Experiments

Finely powdered red phosphorus starts burning as soon as it comes in contact with bromine vapor. It is not even needed to have contact with the liquid, the vapor already ignites the red phosphorus. A white/yellow solid is formed in the reaction. Chlorine gas has a similar effect on red phosphorus as bromine, but the effect is even stronger.

Phosphorous reacts with bromine to form phosphorus

Feb 21, 2021 2P + 3 Br2 -> 2 PBr3 moles Br2 = 40.0/158.8 mol = 0.250 mol moles PBr3 = 0.250 mol Br2 (2 mol PBr3/3 mol Br2) = 0.167 mol Theoretical yield = 0.167 mol(270.7 g/mol) = 45.2 g % yield = (35.9/45.2)100% = 79.5%

Effect of bromine and phosphorus substituents on the glass

Download Citation Effect of bromine and phosphorus substituents on the glass transition properties of some substituted poly(oxy‐1,4‐phenylenes) Poly(oxy-2,6-dimethoxy-1,4-phenylene) and

(PDF) Flame Retardants, Phosphorus ResearchGate

Bromine-phosphorus synergism has been suggested with certain compounds having bromine and phosphorus in the same molecule, such as tris(2,4-dibromophenyl) phosphate ( 51 )[ 2788-11-6],

CDC Facts About Bromine

Getting bromine liquid or gas on your skin could cause skin irritation and burns. Liquid bromine that touches your skin may first cause a cooling sensation that is closely followed by a burning feeling. Swallowing bromine-containing compounds (combinations of bromine with other chemicals) would cause different effects depending on the compound.

Standard Operating Procedure for Screening Phosphorus

Apr 20, 2018 phosphorus, chlorine, bromine and or antimony. However, it is recommended that a method blank is analyzed prior to the analysis of samples and the detection of high after levels of phosphorus, chlorine, bromine and or antimony. If carry over is suspected a method blank shall confirm instrument cleanness. It is also recommended to analyze a

Phosphorous reacts with bromine to form phosphorus

Feb 21, 2021 2P + 3 Br2 -> 2 PBr3 moles Br2 = 40.0/158.8 mol = 0.250 mol moles PBr3 = 0.250 mol Br2 (2 mol PBr3/3 mol Br2) = 0.167 mol Theoretical yield = 0.167 mol(270.7 g/mol) = 45.2 g % yield = (35.9/45.2)100% = 79.5%

Effect of bromine and phosphorus substituents on the glass

Download Citation Effect of bromine and phosphorus substituents on the glass transition properties of some substituted poly(oxy‐1,4‐phenylenes) Poly(oxy-2,6

Phosphorus Tribromide, P Br 3

Phosphorus Tribromide, PBr 3, was first prepared by Balard who added bromine drop by drop to phosphorus.The reaction is violent, but may be moderated by the use of red phosphorus, by carrying out the reaction in CS 2 solution, and by introducing the bromine as vapour. On account of the formation of volatile phosphorus compounds it is advantageous to have an excess of bromine, which is easily

Synergistic Effects of Bromine and Phosphorus on Flame

Key Words : bromine, flame retardancy,flame retardant fiber, PET,phosphorus compound ,polyester,synergis-tic effect. (Journal of the Japan Research Association for Textile End-Uses, Vol.32, pp. 588-598, 1991) 1. Introduction Polyethylene terephthalate (PET) fiber has

Influence of structural effects of halogen and phosphorus

Bromine alone appears to contribute to flame retardancy in the solid as well as the vapor phase. A substantial portion of the bromine from both aliphatic and aromatic bromide flame retardants was accounted for in the char, and this is also true when phosphorus is present. Ionic bromine appears to be the most effective elemental form.

Flame Retardants Fact Sheet

are grouped based on whether they contain bromine, chlorine, phosphorus, nitrogen, metals, or boron. Brominated flame retardants. These chemicals . contain bromine and are the most abundantly used flame retardants. They are used in many types of consumer goods, including electronics, furniture, building materials, and automobiles, to slow or

What Are the Dangers of Bromine in Pools & Spas? Hunker

Bromine is a chemical disinfectant that can be used in swimming pools instead of chlorine. It is also commonly used in hot tubs and spas, because it can better tolerate the heat than chlorine. Although bromine is a better choice for those who have sensitive skin, there are some dangers that pool owners should be aware of before choosing to use

Phosphates in Your Swimming Pool and How To Remove It

Dec 13, 2017 Naturally, you can find phosphorus material all around. That is why it is common for phosphates to be in your swimming pool. But how exactly do phosphates enter your pool? There have been many debates suggesting how phosphates enter your swimming pool. Some argue that excess rainwater or fertilizer can affect your phosphate levels.

Why is Si (silicon) more electronegative than P (phosphorus)?

your question is wrong Electronegativity of Si=1.9 Electronegativity of P=2.19 The positively charged protons in the nucleus attract the negatively charged electrons. As the number of protons in the nucleus increases, the electronegativity or attr...

How to Remove High Phosphates and Stabilizer in a Pool

May 18, 2019 To test stabilizer levels, I highly recommend a professional DPD test kit such as the Taylor Complete Swimming Pool Water kit. It is the same test kit the pros use and will give you very accurate readings. It tests for pH, total alkalinity, free and total chlorine, bromine

CDC Facts About Bromine

Getting bromine liquid or gas on your skin could cause skin irritation and burns. Liquid bromine that touches your skin may first cause a cooling sensation that is closely followed by a burning feeling. Swallowing bromine-containing compounds (combinations of bromine with other chemicals) would cause different effects depending on the compound.

The effect of red phosphorus on the flammability of poly

Yasemin Altun, Mehmet Doğan, Erdal Bayramlı, The effect of red phosphorus on the fire properties of intumescent pine wood flour LDPE composites, Fire and Materials, 10.1002/fam.2336, 40, 5,

Phosphorus, Elemental Reactivities / Incompatibilities

Phosphorus (white or yellow) burns in chlorine gas with a pale green light. Red phosphorus reacts with chlorine at ordinary temperatures. Finely divided red phosphorus ignites spontaneously in chlorine at ordinary temperatures. The reaction of phosphorus and chlorine, fluorine, or bromine

Kinetics and mechanism of the oxidation of lower oxyacids

Kinetics and mechanism of the oxidation of lower oxyacids of phosphorus by hexamethylenetetramine bromine March 2000 International Journal of Chemical Kinetics 32(3):165 170

EFFECTS OF BROMINE AND PHOSPHORUS ON THERMAL

Sep 30, 2010 As a part of a series of studies on effects of Bromine (Br) and Phosphorus (P) on the flame retardancy of PET fibers, this paper is focused on the thermal analytical observations of PET fabric treated with Br and P compounds in comparison with the untreated PET fabric to see how the effects of Br and P as well as of the combination of both elements will be reflected in the thermal analytical

Effect of bromine and phosphorus substituents on the glass

Download Citation Effect of bromine and phosphorus substituents on the glass transition properties of some substituted poly(oxy‐1,4‐phenylenes) Poly(oxy-2,6

Phosphorus Tribromide, P Br 3

Phosphorus Tribromide, PBr 3, was first prepared by Balard who added bromine drop by drop to phosphorus.The reaction is violent, but may be moderated by the use of red phosphorus, by carrying out the reaction in CS 2 solution, and by introducing the bromine as vapour. On account of the formation of volatile phosphorus compounds it is advantageous to have an excess of bromine, which is easily

Synergistic Effects of Bromine and Phosphorus on Flame

Key Words : bromine, flame retardancy,flame retardant fiber, PET,phosphorus compound ,polyester,synergis-tic effect. (Journal of the Japan Research Association for Textile End-Uses, Vol.32, pp. 588-598, 1991) 1. Introduction Polyethylene terephthalate (PET) fiber has

CN102731575A Phosphorus bromine flame retardant agent

The present invention discloses a phosphorus bromine flame retardant agent and a preparation method thereof, and belongs to the technical field of flame retardant agent preparation. According to the method, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and brominated styrene with different bromination degrees are adopted as raw materials to synthesize a flame retardant agent

(PDF) Flame Retardants, Phosphorus ResearchGate

Bromine-phosphorus synergism has been suggested with certain compounds having bromine and phosphorus in the same molecule, such as tris(2,4-dibromophenyl) phosphate ( 51 )[ 2788-11-6],

The effect of red phosphorus on the flammability of poly

Yasemin Altun, Mehmet Doğan, Erdal Bayramlı, The effect of red phosphorus on the fire properties of intumescent pine wood flour LDPE composites, Fire and Materials, 10.1002/fam.2336, 40, 5,

Nutrient limitation of phytoplankton in freshwater and

Nutrient limitation of phytoplankton in freshwater and marine environments: A review of recent evidence on the effects of enrichment 1. R. E. Hecky, Department of Fisheries and Oceans, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba R3T 2N6. Search for more papers by this author.

Phosphates in Your Swimming Pool and How To Remove It

Dec 13, 2017 Naturally, you can find phosphorus material all around. That is why it is common for phosphates to be in your swimming pool. But how exactly do phosphates enter your pool? There have been many debates suggesting how phosphates enter your swimming pool. Some argue that excess rainwater or fertilizer can affect your phosphate levels.

How to Remove High Phosphates and Stabilizer in a Pool

May 18, 2019 To test stabilizer levels, I highly recommend a professional DPD test kit such as the Taylor Complete Swimming Pool Water kit. It is the same test kit the pros use and will give you very accurate readings. It tests for pH, total alkalinity, free and total chlorine, bromine

Kinetics and mechanism of the oxidation of lower oxyacids

Kinetics and mechanism of the oxidation of lower oxyacids of phosphorus by hexamethylenetetramine bromine March 2000 International Journal of Chemical Kinetics 32(3):165 170

Flame Retardants

Mar 05, 2020 They are often broken into categories based on chemical structure and properties. In general, flame retardants are grouped based on whether they contain bromine, chlorine, phosphorus, nitrogen, metals, or boron. Brominated flame retardants — Contain bromine and are the most abundantly used flame retardants. Used in many consumer goods

In a lab experiment, 7.75 g of phosphorus reacts with

Physics An Introduction to Physical Science In a lab experiment, 7.75 g of phosphorus reacts with bromine to form 67.68 g of phosphorus tribromide. (a) Calculate the percentage by mass of P in phosphorus tribromide.

Replacing the OH Group by Halogen Atoms Chemistry

Sep 12, 2020 Other reactions involving phosphorus halides. Instead of using phosphorus(III) bromide or iodide, the alcohol is usually heated under reflux with a mixture of red phosphorus and either bromine or iodine. The phosphorus first reacts with the bromine or iodine to give the phosphorus(III) halide. \[ 2P_{(s)} + 3Br_2 \rightarrow 2PBr_3\label{1.1.5}\]