What is the chemical formula for polycarbonate?
What are the Properties of Polycarbonate?
| Property | Value |
|---|---|
| Technical Name | Polycarbonate (PC) |
| Chemical Formula | C15H16O2 |
| Melt Temperature | 288-316 °C (550-600 °F) *** |
| Typical Mold Temperature | 82 – 121 °C (180 – 250 °F) *** |
Can polycarbonate be prepared from bisphenol A and phosgene?
Polycarbonate gets its name from the carbonate groups in its backbone chain. We call it polycarbonate of bisphenol A because it is made from bisphenol A and phosgene.
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.
How are polycarbonates synthesized with the help of phosgene?
Manufacturing of polycarbonate Most often, polycarbonate is synthesized using Bisphenol A and phosgene by step-growth polymerization method. In such a process chloride ions (Cl-) are eliminated every time when the monomers react. This kind of step-growth polymerization is usually called condensation polymerization.
What is the mass of polycarbonate?
272.29 g/mol
Chemical Properties
| Appearance | Solid |
|---|---|
| Molar Mass | 272.29 g/mol |
| Molecular Formula | C16H16O4 |
| Refractive | 1.58 n20/D |
| Solubility | Insoluble |
How are polycarbonate pellets made?
Polycarbonate is produced via chemical reactions between bisphenol A (BPA) and phosgene COCl2. It was first patented in 1953 by Hermann Schnell at Bayer under the name Melron (later changed to Makloron). Today, polycarbonate is made in a similar way through either injection moulding or extrusion.
Is polycarbonate branched?
Whilst conventional polycarbonate based on bis-phenol A is essentially linear, branched polymers have recently been introduced. These materials have flow properties and a melt stability that makes them particularly suitable for large (20 litre) water and milk containers.
How do you calculate the weight of plastic?
The mass of the piece of plastic = density × volume = 1.18 g/cm3 × 50.0 cm3 = 59 g = 0.059 kg. Step 4: Calculate weight with the acceleration due to gravity. The weight (N) = mass (kg) × acceleration due to gravity (m/s2).
How are polycarbonate resins made?
Polycarbonates are manufactured by polymerization of bisphenol A (C15H16O2) and phosgene (COCl2). Polycarbonate melts at 260-320°C and functions well within a fairly wide temperature range. It has almost twice the impact strength of its nearest neighbors, ABS and PVC.
Does polycarbonate have cross-linking?
Zhao et al. translated these polycarbonate vitrimers into paper composites, that are synthesised via in situ cross-linking inside cellulose networks.
How much polycarbonate is produced from one billion kilograms of phenoxide?
The di phenoxide (Na 2 (OC 6 H 4) 2 CMe 2) reacts with phosgene to give a chloroformate, which subsequently is attacked by another phenoxide. The net reaction from the diphenoxide is: In this way, approximately one billion kilograms of polycarbonate is produced annually.
What is the chemical formula for phosgene?
Phosgene is the chemical compound with the formula COCl2. A colorless gas, in low concentrations its odor resembles freshly cut hay or grass. Phosgene is a valued industrial building block, especially for the production of urethanes and polycarbonate plastics.
How do you synthesize phosgene from bisphenol A?
The first step of the synthesis involves treatment of bisphenol A with sodium hydroxide, which deprotonates the hydroxyl groups of the bisphenol A. The di phenoxide (Na 2 (OC 6 H 4) 2 CMe 2) reacts with phosgene to give a chloroformate, which subsequently is attacked by another phenoxide. The net reaction from the diphenoxide is:
How to determine the amount of oligomer in polycarbonate synthesis?
The amount of oligomer was determined by subtraction of the amount of the produced ester from the amount of reacted diol. Organic carbonates are an important source for polycarbonate synthesis. However, their synthesis generally requires phosgene, sophisticated catalysts, harsh reaction conditions, or other highly reactive chemicals.