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

Periodic, where is the asterisk located

where is the asterisk located

Evaluate slice bread on the basis of appearance and taste, Q. Evaluate slic...

Q. Evaluate slice bread on the basis of appearance and taste? Appearance A slice of bread can be having white/creamy white colour at the center and the brown colour on the

Maximum number of unpaired electron, Which of the following has maximum num...

Which of the following has maximum number of unpaired electron (atomic number of Fe 26): (1) Fe          (2) Fe (II)       (3) Fe (III)               (4) Fe (IV) An

GRAPHITE FURNACE AAS, What are the advantages of graphite furnace AAS? tell...

What are the advantages of graphite furnace AAS? tell the history of graphite furnace AAS

ORGANIS CHEM, equation for the reaction of phosphate ions and ammonium moly...

equation for the reaction of phosphate ions and ammonium molybdate solution in test for phosphorous in lassaignes test

What is line imperfection, Line imperfection : Displacement with a curved b...

Line imperfection : Displacement with a curved boundary makes a mixed dislocation line at the boundary.

Define conjugate acid-base pair and buffer, Q. Define Conjugate acid-base p...

Q. Define Conjugate acid-base pair and buffer? Buffers are substances that resist changes in pH. To "balance pH" means to buffer. Weak acids and bases make good buffers.

VBT AND VSEPR, Ask question #LIMITATIONS OF VBT AND VSEPR

Ask question #LIMITATIONS OF VBT AND VSEPR

Write the cell reactions which occur in lead storage battery, Taking a spec...

Taking a specific example show that AS total is a criterion for spontaneity of a change. Write the cell reactions which occur in lead storage battery (i) when the battery is

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