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

Metallurgy, Why is zinc is not extracted from zinc oxide through reduction ...

Why is zinc is not extracted from zinc oxide through reduction with CO? Solution) Reducing agent should have more negative ΔG value. In case of zinc oxide ,Zn has more negativ

Decomposed at a lower temperature, Why li 2 CO 3 decomposed at a lower tem...

Why li 2 CO 3 decomposed at a lower temperature whereas Na2CO3 at higher temp?

Upward and downward pressure are the same at any given depth, Upward and do...

Upward and downward pressure are the same at any given depth Get a glass cylinder at least 15 cm long and 4 cm in diameter. Such a length of tube can be made from a straight-si

Ionisation energy, Calculate energy of Rb per atom if light of wave length ...

Calculate energy of Rb per atom if light of wave length 5.4(10^-8)m produces electron with a speed of 2.450(10^6)

How to calculate caco3 equivalent , Q.  Ca +2 = 20 ppm, Mg +2 = 25 p...

Q.  Ca +2 = 20 ppm, Mg +2 = 25 ppm, CO 2 = 30 ppm, HCO - 3 = 150, K + = 10 ppm. Calculate the lime (87% pure) and soda (91% pure) required softening 1 million litt

Show the properties of matter, Q. Show the Properties of Matter? Each o...

Q. Show the Properties of Matter? Each of the material the stuff around us is matter. A substance is matter which has a uniform and unchanging composition. For instance water

Determine equilibrium constants for acid and base, Q. Determine Equilibrium...

Q. Determine Equilibrium Constants for Acid and base? Ans. The  pH scale  of acidity is a simple and convenient way to state the acidity of a solution. The

Determing an electrovalent linkage, This of the following is an electroval...

This of the following is an electrovalent linkage: (1) CH 4                 (2) MgCl 2              (3)  SiCl 4                               (4) BF 3 Ans: MgCl

The energy for the first excited state of hydrogen atom, The value of the e...

The value of the energy for the first excited state of hydrogen atom will be: (1) - 13.6 ev                        (2)- 3.40 eV        (3) -1.51eV

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