Addition polymerization, Chemistry

Assignment Help:

Addition polymerization: It involves following three mechanisms:

1.                 Free radical polymerization

2.                 Ionic polymerization mechanism

3.                 Coordination polymerization mechanism

Free-radical polymerization: It involves following steps:

Initial step

1.                 Production of free radicals by the decomposition of compounds called initiators

R-R = 2R

Initiator free radicals

The decomposition of the initiator is splitting into two identical fragments called homiletic decomposition, where each fragment carrier's one unpaired electron with it called free radical.

Chain propagation step: The free radical (R) produced in the chain initiation step adds to an alkenes to form a new free radical, which then reacts with additional monomers in a chain reaction:

R + H2C = RCH2CH2

RCH2CH2 +CH2 = RCH2CH2 :CH2


Related Discussions:- Addition polymerization

Explain cyclobutane, Explain Cyclobutane Cyclobutane undergoes an inte...

Explain Cyclobutane Cyclobutane undergoes an interconversion of puckered forms analogous to the chair interconversion of cyclohexane. This interchanges axial and equatorial gr

Explain hammonds postulate, Explain Hammonds postulate Because the tran...

Explain Hammonds postulate Because the transition states of the two reactions should resemble the respective carbocation intermediates (Hammond's postulate), study the structur

Energy of orbit, Energy of orbit: (1) Increases as we move away from nu...

Energy of orbit: (1) Increases as we move away from nucleus   (2) Decreases as we move away from nucleus  (3) Remains same as we move away from nucleus  (4)None of the

Explain transition elements and their compounds, Explain the following obse...

Explain the following observations: (i)  Generally there is an increase in density of elements from titanium (Z = 22) to copper (z =29) in the first series of transition element

Comparison of alkyl cyanides and alkyl isocyanides, Test Ethyl c...

Test Ethyl cyanide Ethyl isocyanide Smell Strong but pleasant Extremely unpleasant Dipole moment

Lowest sum rule - iupac system of nomenclature, Lowest sum rule - iupac sys...

Lowest sum rule - iupac system of nomenclature previously it may be noted that, the numbering of the parent chain consisting of two or more substituents was done in such a way

Symmetry operations, what are the symmetry operations of N2O5 and C2H2

what are the symmetry operations of N2O5 and C2H2

#title.REACTIONA KINETICS, HOW MANY HALF LIVES ARE REQUIRED FOR THE CONCENT...

HOW MANY HALF LIVES ARE REQUIRED FOR THE CONCENTRATION OF REACTANT TO DECREASE BY 1.56 PERCENT OF ITS ORIGINAL VALUE

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd