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

WHEAT FLOUR, WHY WE CALCULATE GERM OIL ACIDITY OF WHEAT FLOUR?

WHY WE CALCULATE GERM OIL ACIDITY OF WHEAT FLOUR?

Compton effect, What are the significance of compton effect

What are the significance of compton effect

Proteins, determination of proteins in flour sample

determination of proteins in flour sample

Cadiot.chodkiewicz coupling, history of this reaction.is any ligand is need...

history of this reaction.is any ligand is needed for the reaction?

Illustrate kinetic theory of matter, Q. Explain  heat according to kinetic ...

Q. Explain  heat according to kinetic theory of matter? Ans. On an atomic level the definitions of heat and temperature becomes more precise. According to the kinetic theory of

What is meant by integrated coastal zone management, Question : (i) Wh...

Question : (i) What is meant by Integrated Coastal Zone Management? (ii) What is its main objective? (iii) List the principal measures involved in the implementatio

What are the effect of impurities on resistivity, Effect of impurities on r...

Effect of impurities on resistivity: A  small  percentage  of  impurities  can  result  in  substantial  increase  in  resistivity  i.e. decrease in the conductivity. Mathem

Azimuthal quantum number for last electron of na atom, Azimuthal quantum n...

Azimuthal quantum number for last electron of Na  atom is: (1) 1               (2) 2         (3) 3                (4) 0 Ans:  0

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