POLYMERIZATION
 
 
FOR MORE DETAILS CLICK HERE
MONOMER
Single repeating unit of a large molecule or polymer is called a “monomer”.
POLYMER
A high molecular mass compound, which consist of repeating units, is called “polymer”.
POLYMERIZATION
A self-addition reaction in which a number of simple molecules (monomers) are joined to form a very large molecule is called polymerization.
OR
A chemical reaction in which monomers are converted into polymer is called polymerization.
For example:
n(C2H4) (-CH2-CH2-CH2-) or (-CH2-CH2-)n
                               monomer                         polymer
                              (ethylene)                    (polyethene)
TYPES OF POLYMERIZATION
There are two types of polymerization.
Addition polymerization.
Condensation polymerization.
For latest information , free computer courses and high impact notes visit : www.citycollegiate.com
VITAL FORCE THEORY

In old days, it was believed that organic compounds could be produced only by living matte. It was also assumed that living matter possess a mysterious or vital force which converts it into organic compounds and only living matter can produce organic compounds.
FAILURE OF VITAL FORCE THEORY:
Vital force theory has failed now because a number of organic compounds can be prepared by inorganic or non-living stuff.
WHOLER, a German chemist was the first person who, in 1828 prepared an organic substance UREA by using inorganic substance Ammonium Cyanate by boiling with water.
KOCN + NH4Cl KCl + NH4OCN

NH4OCN NH2-C-NH2 (urea)
                       ||
                        O

CATENATION
Carbon has the ability to form successively two other C-atoms to form chains of varying lengths and shapes. This property of carbon is called "Catenation". Catenation is responsible for the variety and a large number of organic compounds.
Due to catenation carbon forms long chains, branched chains, rings, ring and chain structured compounds.
|PHOTOSHOP|FLASH|SWISH|FLAX|INTERNET|PHYSICS|CHEMISTRY|HOME|