Skip to main content

Polymers; Polymer chemistry; monomers; polymerisation; example;uses; questions; revision.

Polymer chemistry
It is a branch of chemistry in which we study about polymers.
Polymer and monomers (Polymers definition)
Polymers are high molecular mass substances containing large number of repeating structural units derived from simple molecules.
The simple molecules from which polymers are derived are called monomers.
Polymerisation
The process of conversion of simple molecules i.e monomers into polymers is called polymerisation.
For example
Polymers example
Polythene
Polyvinyl chloride (PVC)
Nylon
Teflon
Bakelite
Terylene
Cellulose diacetate
Vulcanised rubber
Starch
Melamine formaldehyde resin

Polymers Uses
Coatings
Adhesives
Laminates
Electrolytes
Plastic pipes
Films

Questions on polymers

 What are polymers?
Polymers are high molecular mass substances containing large number of repeating structural units derived from simple molecules.
 What are monomers?
The simple molecules from which polymers are derived are called monomers.
 What is polymerisation?
The process of conversion of simple molecules i.e monomers into polymers is called polymerisation.
 Give examples of some polymers?
Polythene
Polyvinyl chloride (PVC)
Nylon
Teflon
Bakelite
Terylene
Cellulose diacetate
Vulcanised rubber
Starch
Melamine formaldehyde resin
 What is polymer chemistry?
It is a branch of chemistry in which we study about polymers.
 Give some uses of polymers?
Coatings
Adhesives
Laminates
Electrolytes
Plastic pipes
Films


Revision
 Polymer chemistry ------> study of polymers.
Polymer ----->made of repeating monomers.
Monomers ------> simple molecules from which polymers are derived.
Polymerisation -----> process of conversion of monomers into polymers.

Explanation of the above topic in hindi.

Comments

Post a Comment

Popular posts from this blog

Polylactic acid/PLA.

Polylactic acid/PLA. Polylactic acid is a biodegradable thermoplastic polymer . Polylactic acid is obtained from lactic acid monomer. Polylactic acid. Polylactic acid is stable to UV radiation. Polylactic acid has good resistance to moisture. Polylactic acid has good elasticity. Polylactic acid is an aliphatic polyester . It can be used as a food packaging polymer. Polylactic acid is suitable for textile fibre applications such as shirts, carpets, sportswear etc. Polylactic acid is used in implants and medical devices (screws, sutures etc). Polylactic acid is suitable for use in floor mats. Uses of Polylactic acid. Questions on Polylactic acid/PLA; Q1) What is Polylactic acid? Ans) Polylactic acid is a biodegradable thermoplastic polymer. Q2) What is the monomer of Polylactic acid? Ans) Polylactic acid is obtained from lactic acid monomer. Q3) Write some properties of Polylactic acid? Ans) Some properties of Polylactic acid are given below; ...
Post a Comment
Read more

Determination of molecular weight by osmotic pressure method

Determination of molecular weight by osmotic pressure method. Osmotic pressure method is also called membrane osmometry. This method is widely used to determine the number average molecular weight of polymers. This method is based on the phenomenon of osmosis. If a pure solvent is separated from a solution through a semipermeable membrane, due to concentration (chemical potential) difference between the solvent and solution, the solvent will flow into the solution through semipermeable membrane. The pressure applied on the solution to completely stop the flow of solvent into it through semipermeable membrane is called osmotic pressure. The theory of osmotic pressure also applies to a solution of polymers. Ordinary solution obeys Van't Hoff equation i.e π=cRT/M Where π is osmotic pressure, c  is concentration in mass per unit volume, R is gas constant, T is temperature and M is molar mass. The polymer solution are non ideal. Taking into account their deviation and us...
Post a Comment
Read more

Determination of molecular weight of polymers by viscosity method.

Determination of molecular weight of polymers by viscosity method. It is a simple method for determining the molecular weight of polymers. Addition of polymers in the solvent increases the viscosity of the solvent, due to introduction of inhomogeneities by the polymers. If η₀ is the viscosity of the solvent and η is the viscosity of the solution at the same temperature, then the relative viscosity is given by Relative viscosity. Specific viscosity:  It is defined as the relative increase in viscosity and is given as Specific viscosity. Reduced viscosity: It is defined as the relative increase in viscosity per unit concentration (C) of polymer and is given as Reduced viscosity. Intrinsic viscosity: The reduced viscosity is dependent on concentration (C). If a graph is plotted between  reduced viscosity vs concentration then the extraplotation value when C=0 is called intrinsic viscosity. Intrinsic viscosity. Graph of reduced vi...
2 comments
Read more