Calculate the initial radical, Chemistry

(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-1

Posted Date: 2/27/2013 5:22:59 AM | Location : United States







Related Discussions:- Calculate the initial radical, Assignment Help, Ask Question on Calculate the initial radical, Get Answer, Expert's Help, Calculate the initial radical Discussions

Write discussion on Calculate the initial radical
Your posts are moderated
Related Questions
How are the following conversions carried out? (i)  Benzyl chloride to benzyl alcohol, (ii)  Methyl magnesium bromide to 2- methlpropan -2-ol,



The energy of a photon is calculated by: (1) E= hv (2) h= Ev (3) h = E/v (4) E= h/v Ans: E= hv

stuck on a chemistry assignment i need a way to include the elctron configuration and chemical properties of copper into a oral that is also a sales pitch.

150ml of a gas at 27C is heated to 77C at constant pressure.find the new volume of the gas.

Heterolysis bond fission or Heterolytic (i) In heterolysis bond, the covalent bond is broken in such a way that one species (that is., less electronegative) is deprived of its

1. Acetylation of key proteins is known to correlate with the gene expression in eukaryotes. What class of chromatin proteins is modified? What is the chemical nature of the acetyl


what are atoms made of ?