To get the chain contour length
How do you calculate polymers?
Divide the molecular weight of the polymer by the molecular weight of the monomer unit
to calculate the degree of polymerization. If the molecular mass of tetrafluoroethylene is 120,000, its degree of polymerization is 120,000 / 100 = 1,200.
How long is a polyethylene chain?
a) A polyethylene chain is formed from 3000 ethene monomers. Given that the length of a single carbon-carbon bond is
0.154 nm
, calculate the expected end-to-end distance using the random walk model, assuming that each bond is freely jointed.
What is the size of polymer?
Most polymer molecules are
below 100 nm
, and hence, the requirement for size information calls for techniques that have the ability to measure nanoparticles.
How do you calculate kinetic chain length?
For any chemical chain reaction, the chain length is defined as the average number of times that the closed cycle of chain propagation steps is repeated. It is
equal to the rate of the overall reaction divided by the rate of the initiation step in which the chain carriers are formed
.
What is an ideal polymer?
Ideal Polymer Chain. Ideal chain is
a chain in which the links do not interact if they are not close long the chain
. In other words, the so-called volume interactions, i.e. interactions between distant links which come close to each other due to the chain flexibility, are neglected.
What is a polyethylene chain?
Polyethylene, composed of repeating ethylene monomers, is
an addition polymer
. It may have as many as 10,000 monomers joined in long coiled chains. Polyethylene is crystalline, translucent, and thermoplastic—i.e., it softens when heated.
What do you mean by co polymer?
A copolymer is a
polymer formed when two (or more) different types of monomers are linked in the same polymer chain
, as opposed to a homopolymer where only one monomer is used. From: The Effect of Creep and Other Time Related Factors on Plastics and Elastomers (Second Edition), 2009.
What is molecular weight of polymer?
Polymer molecular weight is
the molecular mass of a polymer chain
. It can be obtained by multiplying the mass of each repeating unit (M
0
) by the degree of polymerisation and then adding the mass of end groups. For a linear polymer, it is rare that all polymer chains have the same mass.
Which of the following is a thermosetting polymer?
Now
Bakelite
is a cross linked polymer which after heating can not be recovered in its original structure. Hence it is a thermosetting polymer.
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
.
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.
What shape does a polymer have?
What are the size and shape of a polymer molecule? This is arguably the most interesting, challenging and beautiful question that has been answered about polymers: 1. The shape is that
of a random coil
.
What are examples of polymers?
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.
Who is the father of polymer physics?
Herman Francis Mark
, (born May 3, 1895, Vienna, Austria—died April 6, 1992, Austin, Texas, U.S.), Austrian American chemist who, although not the world’s first polymer chemist, was known as the father of polymer science because of his many contributions to polymer science education and research.
What is the radius of gyration of a polymer?
The radius of gyration is
one measure of the size of the random coil shape which many synthetic polymers adopt
in solution or in the amorphous bulk state. (The radius of gyration and other measures of macromolecular size and shape are considered in more detail in Section 1.13.)
