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

Hittorf method.., determination of transport number by hittorfs method.

determination of transport number by hittorfs method.

Commercial cells, Prepare an assignment on the topic commercial cells

Prepare an assignment on the topic commercial cells

What do you mean by isotopes, Q. What do you mean by Isotopes? Isotopes...

Q. What do you mean by Isotopes? Isotopes and mass number although all atoms of an element have the same number of protons most elements have atoms with different numbers of ne

Describe about atomic number, Q. Describe about atomic number? It is si...

Q. Describe about atomic number? It is significant to be able to obtain useful information from the periodic table. Beginning with the simplest element hydrogen the periodic ta

Number of neutrons in heavy hydrogen atom is, Number of neutrons in heavy h...

Number of neutrons in heavy hydrogen atom is: (1) 0        (2) 1        (3) 2        (4) 3 Ans:  1

Show the diffrent kind of matter, Q. Show the diffrent kind of matter? ...

Q. Show the diffrent kind of matter? Liquid matter has a specific volume like a solid but flows and takes the shape of its container. A liquid is incompressible for the reaso

Aromatic nitro compounds - nitrogen containing compounds, Aromatic Nitro Co...

Aromatic Nitro Compounds Aromatic nitro compounds are the derivatives of aromatic hydrocarbons where one or more hydrogen atom (s) of the benzene nucleus has been changed by ni

Applications of potentiometry, Applications of potentiometry: One of t...

Applications of potentiometry: One of the most common and earliest applications of potentiometry is pH determination, and titration for the determination of electro active spe

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