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

Magnetic moment, what is the reason for kmno4 to exibhit pink colour

what is the reason for kmno4 to exibhit pink colour

Explain detergents, Explain detergents? Give their scheme classification...

Explain detergents? Give their scheme classification. Why are the detergents preferred over soaps?

Chemical properties proteins - salt formation, Chemical Properties Proteins...

Chemical Properties Proteins - Salt formation (i) Salt formation : Due  to  existence of  both -NH 2 and -COOH groups in proteins, they make salts along with acids and bases.

#tit4-pyridinecarboxaldehyde.., synthesis, posted date 1/12/2013 7;26;41 pm...

synthesis, posted date 1/12/2013 7;26;41 pm\location ;austeralia

Kinetic energy, Overall reaction is H+ + I- +H2O2 -> H2O +HIO. If you wante...

Overall reaction is H+ + I- +H2O2 -> H2O +HIO. If you wanted to increase the rate of the overall reaction, would it be better to increase the concentration of H+ or I-. Why?

What are the ligands, Q. What are the Ligands? Ligands: The ions and/...

Q. What are the Ligands? Ligands: The ions and/or molecules which are directly attached to the central atom/ion are called ligands. A ligand could be an iron, an atom or a ne

How can we obtain boron, Q. How can we obtain Boron? Boron is- obtained...

Q. How can we obtain Boron? Boron is- obtained by the red-action of B 2 O 3 with magnesium or sodium B 2 0 3 is first prepared by strongly katingH 3 B0 3 which is obtained b

What is spontaneous processes?, Q. What is Spontaneous processes? Ans. ...

Q. What is Spontaneous processes? Ans. Spontaneous processes are events which occur without any assistance. When an object is held above the floor, it falls when released. Ic

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