Table of Contents
What is diphenyl carbonate used for?
Diphenyl carbonate (DPC) is a carbonate ester of formula (C6H5O)2CO, which is mostly used as a critical comonomer in the manufacture of polycarbonate resin, an engineering thermoplastic with high impact resistance and excellent optical properties.
Is diphenyl carbonate toxic?
CONSIDERED A HAZARDOUS SUBSTANCE ACCORDING TO OSHA 29 CFR 1910.1200. Harmful by inhalation, in contact with skin and if swallowed.
How is Diphenyl carbonate made?
The bulk chemical diphenyl carbonate (DPhC), which is an important reagent in the manufacture of polycarbonates, has been produced by the oxidative carbonylation of phenol with carbon monoxide (CO) and air-oxygen catalyzed by Pd dinuclear complexes and redox catalyst (Equation (4)) <1999JMOC(148)289, 2000JMOC(154)243>.
What is phenyl carbonate?
Diphenyl carbonate is the organic compound with the formula (C6H5O)2CO. It is classified as an acyclic carbonate ester. It is a colorless solid. It is both a monomer in combination with bisphenol A in the production of polycarbonate polymers and a product of the decomposition of polycarbonates. Diphenyl carbonate.
Which is a polymer of BPA and diphenyl carbonate?
Polycarbonate (PC) is a thermoplastic polymer produced by the condensation reaction between bisphenol A (BPA) and a carbonyl source, generally phosgene or diphenyl carbonate (DPC) [8].
What is phosgene used for?
Phosgene is a major industrial chemical used to make plastics and pesticides. At room temperature (70°F), phosgene is a poisonous gas. With cooling and pressure, phosgene gas can be converted into a liquid so that it can be shipped and stored.
How is polycarbonate synthesized?
Manufacture of polycarbonates The polycarbonate most used is manufactured by condensation polymerization between bisphenol A and either carbonyl chloride or diphenyl carbonate. Bisphenol A is produced by the condensation of phenol with propanone.
Which of the following reactants are used to obtain methyl phenyl ether?
Methyl phenyl ether is obtained by the reaction of phenolate ions and methyl iodide.
Does polycarbonate become brittle?
Polycarbonate may become brittle when exposed to ionizing radiation above 25 kGy (J/kg).
Is phenol A solvent?
Phenol (also called carbolic acid) is an aromatic organic compound with the molecular formula C6H5OH. It is a white crystalline solid that is volatile….Phenol.
| Names | |
|---|---|
| Boiling point | 181.7 °C (359.1 °F; 454.8 K) |
| Solubility in water | 8.3 g/100 mL (20 °C) |
| log P | 1.48 |
| Vapor pressure | 0.4 mmHg (20 °C) |
Does phosgene react with water?
Phosgene reacts slowly with water to form carbon dioxide and hydrochloric acid. Phosgene reacts readily with caustic solution and even more readily with ammonia and ammonia water.
How do you neutralize phosgene?
A base, such as calcium oxide or hydroxide, sodium bicarbonate or even ammonia, best mixed with water as solution or suspension can be used to safely neutralize phosgene. The products are non-toxic and can be safely disposed of.
Does polycarbonate absorb water?
Polycarbonate absorbs water in two stages: in the initial period of absorption at an elevated temperature all of the water was found in an unassociated state when cooled to room temperature; and, in the second stage, most of the additional water absorbed by the polymer was identified in a separate liquid phase ( …
Is polycarbonate water resistant?
Polycarbonate is a transparent thermoplastic where functional groups are linked together by carbonate groups (–O–(C=O)–O–). Its high strength makes it resistant to impact and fracture. It is a perfect choice for baby bottles, refillable water bottles, sippy cups, and many other food and beverage containers.
How is methyl phenyl ether prepared?
Methyl phenyl ether can be obtained by reacting:
- A. Phenolate ions and methyl iodide.
- B. Bromobenzene with methoxide ions.
- C. Methanol and phenol.
- D. Bromobenzene and methyl iodide.
What is the action of phosphorus on methyl phenyl ether?
When methyl phenyl ether is heated with phosphorus pentachloride, a mixture of methyl chloride, chlorobenzene is formed.
Why is polycarbonate toxic?
Toxic – Polycarbonates are considered to be hazardous when they come in contact with food due to the release of Bisphenol A (popularly known as BPA) during degradation due to material contact with water. Mostly, all polycarbonates are made by a combination of BPA and COCl2.
Is diphenyl carbonate solid or liquid?
It is a colorless solid. It is both a monomer in combination with bisphenol A in the production of polycarbonate polymers and a product of the decomposition of polycarbonates. World production capacity of diphenyl carbonate was 254,000 tonnes in 2002, and phosgenation of phenol is the most significant route.
How do you make diphenyl carbonate from phenol?
The bulk chemical diphenyl carbonate (DPhC), which is an important reagent in the manufacture of polycarbonates, has been produced by the oxidative carbonylation of phenol with carbon monoxide (CO) and air-oxygen catalyzed by Pd dinuclear complexes and redox catalyst (Equation (4)) <1999JMOC (148)289, 2000JMOC (154)243>.
What is the standard state of diphenyl carbonate in KPA?
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).?) Diphenyl carbonate is the organic compound with the formula (C 6 H 5 O) 2 CO. It is classified as an acyclic carbonate ester. It is a colorless solid.
Is diphenyl carbonate a monomer or ester?
Diphenyl carbonate is an acyclic carbonate ester. It is both as a monomer in combination with bisphenol A in the production of polycarbonate polymers and a product of the decomposition of polycarbonates. World production capacity of diphenyl carbonate was 254,000 tonnes in 2002, and phosgenation of phenol is the most significant route.