free radical polymerisation, Chemistry

Assignment Help:
#ques(a) Given the values below, calculate the concentration of benzoyl peroxide required to prepare polystyrene with a number average molar mass of 400,000 by bulk free radical polymerisation at 60°C, assuming all termination is by combination.

f = 0.6

kd=2×10-6 s-1

kp= 341 M-1 s-1

kt=4×107 M-1s-1

density of styrene = 880 kg m-3.

(b) Calculate the initial radical concentration and initial rate of polymerisation for this reaction.

(c) Given the values below for the activation energies of benzoyl peroxide dissociation, styrene propagation, and styrene termination, and assuming all other parameters remain constant calculate the number average molar mass, initial radical concentration, and initial rate of polymerisation if the reaction is run at 66°C rather than 60°C.

EA dissociation = 115 kJ mol-1

EA propagation = 34 kJ mol -1

EA termination = 10 kJ mol-1tion..

Related Discussions:- free radical polymerisation

The magnetic quantum number for an electron, The magnetic quantum number fo...

The magnetic quantum number for an electron when the value of principal quantum number is 2 can have: (1)3 values (2) values (3)9 values (4)6 values Ans: 3 values

Titration Lab, How do i figure out number of protons available for reaction...

How do i figure out number of protons available for reaction with OH- in a oxalic acid+NaOH reaction?

What are the properties of nitrogen, Q. What are the Properties of Nitrogen...

Q. What are the Properties of Nitrogen? Ans. Physical Properties of Nitrogen Nitrogen is a colorless, odorless and tasteless gas. It is particularly unreactive at roo

When an electron jumps from lower to higher orbit energy, When an electron ...

When an electron jumps from lower to higher orbit, its energy : (1) Increases (2) Decreases (3) Remains the same (4) None of these Ans:  Increases

Electrochemistry, calculate the voltage of the cell mg/mg+//cd2+/cd at 250c...

calculate the voltage of the cell mg/mg+//cd2+/cd at 250c.when[cd2+]=7*10-11 M,[mg2+]=1.0M and standerd electrode potential=1.97V.

Molecular mass and atomic mass of sulphur & atomicity, If molecular mass an...

If molecular mass and atomic mass of sulphur are 256 and 32 respectively, its atomicity is: (1) 2        (2) 8         (3 )4        ( 4)16 Ans: 8

Reagent required for determination of hardness of water. , Q.   Name of the...

Q.   Name of the reagent required for determination of hardness of water sample of complex metric method. Briefly give the function of each reagent used. Ans. Reagents requir

Chemical names and formulas, what is the formula for the binary ionic compo...

what is the formula for the binary ionic compound formed between sodium and iodine

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

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