Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Chemistry Expert

Polymers

1. The table below gives intrinsic viscosity values determined by viscometry and weight- average molar mass values determined under the same conditions by static light scattering

1501_Intrinsic viscosity.jpg

What are the Mark-Houwink parameters for this polymer?

Discuss the applicability of the Mark-Houwink model to this polymer?

2.(a) Given the values below, compute the concentration of benzoyl peroxide needed 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) Compute 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 compute 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

Chemistry, Academics

  • Category:- Chemistry
  • Reference No.:- M91799

Have any Question? 


Related Questions in Chemistry

Chemistry final examdirections it is important that you

Chemistry Final Exam Directions: It is important that you provide answers in your own words. Please focus only on information from the text/eBook to create your own solutions. Please do not use direct information from an ...

A the mass spectrometer in figure 212 has a magnet as one

(a) The mass spectrometer in Figure 2.12 has a magnet as one of its components What is the purpose of the magnet? (b) The atomic weight of Cl is 35.5 amu. However, the mass spectrum of Cl (Figure 2.13) does not show a pe ...

Lab reportreport atear out the originals from your work

Lab Report Report A Tear out the originals from your work above and turn it into your lab instructor. Although no points are assigned to this, students who fail to turn in their notes will have 2 points deducted from the ...

A superconductor is a substance that is able to conduct

A superconductor is a substance that is able to conduct electricity without resistance, a property that is very desirable in the construction of large electromagnets. Metals have this property if cooled to temperatures a ...

You have a graduated cylinder that contains a liquid see

You have a graduated cylinder that contains a liquid (see photograph). Write the volume of the liquid, in milliliters, using the proper number of significant figures.

Pre-lab1what is the equation for densitythe density

Pre-Lab: 1. What is the equation for density? The Density Calculator uses the formula that density (p) is equal to mass (M) divided by volume (V) or p=M/V. The calculator can use any two of the values to calculate the th ...

Dolomite is a mineral consisting of calcium carbonate and

Dolomite is a mineral consisting of calcium carbonate and magnesium carbonate. When dolomite is strongly heated, its carbonates decompose to their oxides (CaO and MgO) and carbon dioxide is expelled. (a) Write separate e ...

Complete the following table by filling in the formula of

Complete the following table by filling in the formula of the ionic compound derived from the cations on the left and each of the anions across the top. I - NO 2 - SO 3 2- Mg 2+ Au 3+

Under appropriate experimental conditions h2 and co undergo

Under appropriate experimental conditions, H2 and CO undergo a combination reaction to form CH3OH. The following drawing represents a sample of H2. Make a corresponding drawing of the CO needed to react completely with t ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate