There are two types of polymers:
synthetic and natural
. Synthetic polymers are derived from petroleum oil, and made by scientists and engineers. Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy.
What are the 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 are 2 natural polymers?
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 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 are the two main types of polymers?
- thermosetting plastic or thermoset.
- thermoforming plastic or thermoplastic.
What are 3 properties of polymers?
A1.1 PHYSICAL PROPERTIES
Physical properties of polymers include
molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on
.
What is the strongest polymer?
PBO
was first developed in the 1980’s and is the world’s strongest man-made fiber. It is also the first organic fiber whose cross-sectional strength outperforms both steel and carbon fiber. Zylon® PBO is a rigid-rod isotropic crystal polymer that is spun by a dry-jet wet spinning process.
What are polymers explain with example?
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 make up many of the materials in living organisms, including, for example,
proteins, cellulose
, and nucleic acids.
What are the 5 natural polymers?
- Cellulose.
- Chiton.
- Carbohydrates.
- Proteins.
- Nucleic acids.
- Rubber.
Is cotton a polymer?
Cotton is a polymer which is
made up of cellulose
. Cellulose is a carbohydrate which is also a polymer of repeated chains of glucose. Therefore, the correct answer is option (B). Cotton is a polymer made up of Cellulose.
Is hair a polymer?
Silk and hair are polymers known as
polypeptides
. Cellulose, which makes up the cell wall of plants, is another natural polymer. The proteins we eat, and which we’re made of, are polymers made up of amino acids. And even our DNA is a polymer—it’s made of monomers called nucleotides.
What are the uses 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 are the general properties of polymers?
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 Class 8?
A polymer is
a very big molecule formed by the combination of a large number of small molecules
. The small molecules which join together to form a polymer is called monomer. The monomer which make a polymer may be of the same compound or of different compounds.
What are disadvantages of polymers?
The strength to size ratio of polymer is less while for metals is more
. Cannot be machined easily and limited speed for machining for it. Heat capacity of polymer is very less so cannot be used in heat applications. Heavy structure cannot be made by polymer as the structural rigidity is very less.
What is a polymer melt?
Polymer melts are
solvent-free, viscoelastic liquids consisting of entangled macromolecules
with a monomer volume fraction ηm=πρmb3/6 comparable with that of simple liquids.