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Polyacrylonitrile Synthesis & Yield

This document discusses the calculation of the volume and weight of acrylonitrile monomer used, and how to calculate the percent yield of the polymer product. It also discusses emulsion polymerization, which is the method used to produce polyacrylonitrile from acrylonitrile monomer using benzoyl peroxide as an initiator. Several questions are then asked about the differences between emulsion and suspension polymerization, the purpose of using a condenser, what causes an emulsion, and common uses and sources of emulsions and polyacrylonitrile.

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Walid Adnan
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49 views2 pages

Polyacrylonitrile Synthesis & Yield

This document discusses the calculation of the volume and weight of acrylonitrile monomer used, and how to calculate the percent yield of the polymer product. It also discusses emulsion polymerization, which is the method used to produce polyacrylonitrile from acrylonitrile monomer using benzoyl peroxide as an initiator. Several questions are then asked about the differences between emulsion and suspension polymerization, the purpose of using a condenser, what causes an emulsion, and common uses and sources of emulsions and polyacrylonitrile.

Uploaded by

Walid Adnan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Calculation

Volume of monomer Acrylonitrile=10ml, then the weight of Acrylonitrile can be

calculated by density

Density of Acrylonitrile = 0.806 g/mL

Density=W/V

Weight=density × volume=0.806×5=4.03g

Weight of polymer (product)=

Then the percent yield of polymer can be calculated as

The percent yield=(weight of polymer (product)/weight of monomer

(reactant))×100

The percent yield=

1
Discussion

This experiment is done in order to produce polyacrilonitrale from the monomer


acrylonitrile using the chain growth polymerization by emulsion method , using the
benzoyl peroxide as initiator.
1. What are the differences between emulsion and suspension
polymerization ?
a) That a suspension polymerization is a mechanical process, and must have a
stabilizing agent until the droplets are far apart,
b) The emulsion polymerization is a chemical process which requires a surfactant
to make the monomer "emulsify.
2. What is the purpose of using condenser in this experiment?
The purpose of the condenser is to cool the vapors of the components of the
mixture, allowing them to condense to liquid form and be collected.
3. What causes an emulsion?
An emulsion is formed when two nonsoluble liquids (e.g., an oil and water) are
agitated together to disperse one liquid into the other, in the form of drops.
Emulsions can either be oil-in-water (O/W) or water-in-oil (W/O), depending on
whether the continuous phase is the water or the oil, respectively.
4. What are uses of emulsions?
(i) Cleansing action of soaps is based on the formation of emulsions. (ii) Digestion
of fats in intestines takes place by the process of emulsification. (iii) Antiseptics
and disinfectants when added to water form emulsions. (iv) The process of
emulsification is used to make medicines.
5. Where does polyacrylonitrile come from?
Most polyacrylonitrile is produced as acrylic and modacrylic fibre, a common
substitute for wool in clothing and home furnishings. Acrylonitrile (CH2=CHCN),
a compound obtained by reacting propylene with ammonia (NH3)... PAN has none
of the hazardous properties of the monomer.

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