polymer,
any of a class of natural or synthetic substances composed of very large molecules
, called macromolecules, that are multiples of simpler chemical units called monomers. … Polymers are not restricted to monomers of the same chemical composition or molecular weight and structure.
What is the correct definition for a polymer?
:
a chemical compound or mixture of compounds formed by polymerization and consisting essentially of repeating structural units
.
What is a polymer simple definition?
polymer,
any of a class of natural or synthetic substances composed of very large molecules
, called macromolecules, that are multiples of simpler chemical units called monomers. … Polymers are not restricted to monomers of the same chemical composition or molecular weight and structure.
What is polymer and example?
Polymer is a substance made up of a large number of smaller molecules that link together to form larger molecules. An example of a
synthetic polymer is plastic
. An example of a natural polymer is rubber. … Any of various chemical compounds made of smaller, identical molecules (called monomers) linked together.
What is a polymer GCSE?
Polymers are
very large molecules made when many smaller molecules join together, end to end
. The smaller molecules are called monomers. In general: lots of monomer molecules → a polymer molecule. The polymers formed are called addition polymers.
What are 4 types of polymers?
Terms. Synthetic polymers are human-made polymers. From the utility point of view, they can be classified into four main categories:
thermoplastics, thermosets, elastomers, and synthetic fibers
.
What is the use of polymer?
| Polymer Properties Uses | Poly(chloroethene) ‘PVC’ Tough, electrical insulator, can be made hard or flexible Insulation for electrical wires, windows, gutters, pipes | Poly(tetrafluoroethene) ‘PFTE’ Slippery, chemically unreactive Non-stick coatings for pans, containers for laboratory substances |
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What’s another word for polymer?
- polyurethan.
- synthetic resin.
- trimer.
- compound.
- DNA.
- deoxyribonucleic acid.
- RNA.
- polyurethane.
What are two types of polymers?
Polymers are of two types:
naturally occurring and synthetic or man made
.
What are the 3 main types of polymers?
There are 3 principal classes of polymers –
thermoplastics, thermosets, and elastomers
. Differentiation between these classes is best defined by their behaviour under applied heat. Thermoplastic polymers can be either amorphous or crystalline. They behave in a relatively ductile manner but often have low strength.
What is the example of polymer?
Examples of synthetic polymers include
nylon, polyethylene, polyester, Teflon, and epoxy
. Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.
What are the characteristics of polymer?
Some of the useful properties of various engineering polymers are
high strength or modulus to weight ratios
(light weight but comparatively stiff and strong), toughness, resilience, resistance to corrosion, lack of conductivity (heat and electrical), color, transparency, processing, and low cost.
What is polymer process?
“Polymer Processing” may be defined as
the manufacturing activity of converting raw polymeric materials into finished products of desirable shape, microstructure and properties
.
Is DNA a polymer?
And even our DNA is
a polymer
—it’s made of monomers called nucleotides. The first man-made polymers were actually modified versions of these natural polymers.
How do u form polymers?
Assorted combinations of heat, pressure and catalysis alter the chemical bonds that hold monomers together, causing them to bond with one another
. Most often, they do so in a linear fashion, creating chains of monomers called polymers.
What is the formula of polymer?
| Name(s) Formula Monomer | Polyethylene high density (HDPE) –( CH 2 -CH 2 ) n – ethylene CH 2 =CH 2 | Polypropylene (PP) different grades –[CH 2 -CH(CH 3 )] n – propylene CH 2 =CHCH 3 | Poly(vinyl chloride) (PVC) –(CH 2 -CHCl) n – vinyl chloride CH 2 =CHCl | Poly(vinylidene chloride) (Saran A) –(CH 2 -CCl 2 ) n – vinylidene chloride CH 2 =CCl 2 |
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