Question

The
which there is no
process of
of polymerization
is no
eliminon
of by
product​

Answer 1

Answer:

Addition polymerization

Addition polymerization, or chain reaction polymerization, requires the monomers to have at least one double bond. In addition polymerization, no molecule is eliminated and no by-product is generated. The molecular weight of the formed polymer is exactly the same as the sum of all monomers included in the polymerization. A chain reaction links monomers together by rearranging the bonds with each monomer. For example, the reaction to synthesize ethylene is

(2)

The initiation of addition polymerization (in above case, the breaking of a double bond) requires catalysts, pressure, heat or UV light. The growing polymer chain is a free radical in the polymerization. Terminal radicals are required for ending the reaction.

There are three steps in this type of polymerization: initiation, propagation, and termination. During initiation, the monomer acquires an active site to become a free radical. The addition of initiators or other approaches such as absorption of heat, light or irradiation can trigger the initiation process. In propagation, the initiated monomers add other monomers in rapid succession. This step continues until the active site, which is continuously relocated at the end of the growing chain during propagation, is deactivated by chain termination or chain transfer. The termination step involves the reaction of a polymer chain radical with another free radical. These three steps constitute the normal step-growth polymerization process. However, in many cases, a fourth step, namely, chain transfer, is also included. In chain transfer, the growing activity of a polymer chain is transferred to previously inert species.

Answer 2

Answer:

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Explanation:

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