(a)addition polymerization-Addition polymerization is the process where a small unsaturated monomer (alkene ) molecule join together to form a large saturated molecule. Only alkenes undergo addition polymerization.
Addition polymers are named from the alkene/monomer making the polymer and adding the prefix “poly” before the name of monomer to form a polyalkene.
During addition polymerization
(i)the double bond in alkenes break
(ii)free radicals are formed
(iii)the free radicals collide with each other and join to form a larger molecule. The more collisions the larger the molecule.
(b)condensation polymerization-Condensation polymerization is the process where two or more small monomers join together to form a larger molecule by elimination/removal of a simple molecule. (usually water).
Condensation polymers acquire a different name from the monomers because the two monomers are two different compounds
During condensation polymerization:
(i)the two monomers are brought together by high pressure to reduce distance between them.
(ii)monomers realign themselves at the functional group.
(iii)from each functional group an element is removed so as to form simple molecule (of usually H2O/HCl)
(iv)the two monomers join without the simple molecule of H2O/HCl
Wilfykil answered the question on February 19, 2019 at 06:16
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