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

Describe the charles law, Q. Describe the Charles Law and show graph betwee...

Q. Describe the Charles Law and show graph between temperature and volume? Ans. Charles' law describes the relationship between the temperature and the volume of a gas

Place light rays from highest to lowest energy, Q. Place these types of lig...

Q. Place these types of light in order from highest to lowest energy. Infrared light, ultraviolet, radio waves, microwaves, green light? Ans: Highest Energy radio waves

Indoctomeric effect, Explain indoctomeric effect with example of nitro comp...

Explain indoctomeric effect with example of nitro compound?

Define structure of cis-1-3-dimethylcyclohexane, The two chair conformation...

The two chair conformations of cis-1,3-dimethylcyclohexane

The phosphate of a metal has the formula mpo4, The phosphate of a metal has...

The phosphate of a metal has the formula MPO4 .The formula of its nitrate will be: (1) MNO 3                                                   (2)  M 2 (NO 3 ) 2

What is anionic intermediate, What is anionic intermediate The spectrum...

What is anionic intermediate The spectrum is consistent with the formation of an anionic intermediate-a stable Meisenheimer complex.  (The dotted lines symbolize resonance delo

Explain the working of chemical cell, Q. Explain the working of chemical ce...

Q. Explain the working of chemical cell ? Ans. A  chemical cell  can be set up by dipping two different metals in an electrolyte and connecting the two metals with an external

Molarity and normality, When 100 ml of M/10 H2SO4 is mixed with 500 ml of M...

When 100 ml of M/10 H2SO4 is mixed with 500 ml of My/10 NaOH then nature of resulting solution and normality of excess reactant left is

Metamerism - type of isomerism, Metamerism - Type of Isomerism This typ...

Metamerism - Type of Isomerism This type of isomerism is due to the difference in the nature of alkyl groups attached to the polyvalent atoms or functional set. Metamers always

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