What is a good solvent for a polymer?
Polar groups bond to polar solvents. Hydrogen bonding is the giant electromagnet of the polymer world. This means water [super polar] and alcohols [polar but greasy] are good at dissolving things.
Which is a polymer of tetrafluoroethylene?
Teflon, a polymer of tetrafluoroethylene, is an excellent plastic material for films and coatings.
What functional group is common to the monomers that make up addition polymers?
Proteins are polymers of amino acids, which are monomers that have an amine functional group and a carboxylic acid functional group. These two groups react to make a condensation polymer, forming an amide bond: Proteins are formed when hundreds or even thousands of amino acids form amide bonds to make polymers.
What is the monomer of polymer?
All monomers have the capacity to form chemical bonds to at least two other monomer molecules. Polymers are a class of synthetic substances composed of multiples of simpler units called monomers….Monomers and Polymers.
| Bio-Polymer | Type | Monomer(s) |
|---|---|---|
| Proteins | heteropolymer | amino acid units |
| Polynucleotides | heteropolymer | nucleotide units |
How are polymers dissolved in solvents?
The dissolution of a polymer into a solvent involves two transport processes, namely solvent diffusion and chain disentanglement. When an uncrosslinked, amorphous, glassy polymer is in contact with a thermodynamically compatible solvent, the solvent will diffuse into the polymer (Fig.
Does PVC dissolve in acetone?
Acetone is used as a solvent for PVC; it penetrates, softens and eventually dissolves the material, so using undiluted acetone will lead to PVC damage over time.
What is the formula for tetrafluoroethylene?
C2F4
Tetrafluoroethylene/Formula
How is tetrafluoroethylene made?
Tetrafluoroethylene is produced by heating chlorodifluoromethane, which is made from chloroform by its reaction with hydrogen fluoride in the presence of antimony pentachloride; chlorodifluoromethane (known by several trade names, of which the oldest is Freon 22) is used as a refrigerant in small air conditioners.
How are addition polymers formed from monomers?
An addition polymer is a polymer formed by chain addition reactions between monomers that contain a double bond. Molecules of ethene can polymerize with each other under the right conditions to form the polymer called polyethylene.
How are addition polymers made?
An addition polymer is a polymer that forms by simple linking of monomers without the co-generation of other products. Addition polymers are formed by the addition of some simple monomer units repeatedly. Generally polymers are unsaturated compounds like alkenes, alkalines etc.
Is carbohydrates a monomer or polymer?
Interactive: Monomers and Polymers: Carbohydrates, proteins, and nucleic acids are built from small molecular units that are connected to each other by strong covalent bonds. Functions of Carbohydrates. A carbohydrate is a polymer, with sugar being the monomer.
What monomer is in carbohydrates?
Carbohydrates are the polymers that are made up of monomers called a monosaccharide. The common monomers of carbohydrates are simple sugars like glucose and fructose. It is also one of the four basic macromolecules of life. Monosaccharides – these are the simple sugars.
Which is the best solvent to dissolve tetrafluoroethylene?
Perfluorinated cycloalkane solvents for dissolving high melting polymers containing tetrafluoroethylene, are disclosed. These solvents dissolve such polymers more rapidly, and/or are more stable, than previously known solvents. Also disclosed is a process for dissolution of the polymers and their resulting solutions.
Which is a co polymer of ethene and tetrafluoroethene?
ETFE is a co-polymer of tetrafluoroethene and ethene:and is usually known by its trivial name, ethylene tetrafluoroethylene (ETFE):
What is the residence time of poly tetrafluoroethene?
Reactor residence time is 1 second. The monomer is transformed into the polymer poly (tetrafluoroethene) (PTFE), by radical polymerization. The reaction is carried out by passing TFE into water containing a radical initiator, e.g. ammonium persulfate, (NH 4) 2 S 2 O 8, at 310-350 K and a pressure of 10-20 atm. Two different procedures are used:
Which is the monomer in polytetrafluoroethene ( PTFE )?
Poly (1,1-difluoroethene) or poly (vinylidene difluoride (PVDF) is produced using 1,1-difluorethene (vinylidene difluoride) as the monomer in place of tetrafluorethene used when producing PTFE. A third homopolymer is poly (chlorotrfluoroethene) (PCTFE) for which the monomer is chlorotrifluoroethene: