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

When 0430 mole of titanium is combusted in a bomb

When .0430 mole of titanium is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 30.00degress Celsius to 91.60 degrees Celsius. In a separate experiment, the heat capacity of the calorime ...

1 when toluene is used in free radical bromination a very

1. When toluene is used in free radical bromination, a very small amount of product is formed that contains only carbons and hydrogens and no bromine. Show the structure of that product and the arrow curved mechanism of ...

Consider a string with a length of 545 cm tied at both end

Consider a string with a length of 54.5 cm tied at both end (like on a stringed instrument). If the frequency of the first harmonic on the string is 256 Hz, determine the speed of the wave in the string. Post your answer ...

1 the general public often expects solutions to our

1. The general public often expects solutions to our environmental issues that have zero risk. Explain in less than 200 words whether this is possible, supporting your answer with a thoughtful discussion of what risk is ...

Directionsrefer back to equation 2 and consider carefully

Directions: "Refer back to equation (2), and consider carefully whether you could simply have used the pH value of the solution at the very beginning of the titration, before any base had been added, to determine either ...

If you eat a 48 g serving rice every fourth day and you

If you eat a 48 g serving rice every fourth day and you weigh 75 kg, what is your dose of inorganic arsenic (in µg per kg body weight per day) if the rice contains 386 µg kg -1 of total arsenic, 45% of which is inorganic ...

Using the following data calculate the pressure of 1000mol

Using the following data, calculate the pressure of 100.0mol of CO(g) in a 40.0L container at 25 degrees Celcius using both the ideal gas equation and the real gas equation. Why are these two values so different? (aCO=14 ...

How many grams of silver nitrate are required to produce

How many grams of silver nitrate are required to produce 44.00 g of aluminum nitrate? 6AgNO 3   +  Al 2 (SO 4 ) 3   →  3Ag 2 SO 4   +  2Al(NO 3 ) 3

What is the sum of all coefficients when the following net

What is the sum of all coefficients when the following net ionic equation is balanced using the smallest whole number coefficients possible? Do not forget coefficients of one. MnO 4 - + Mn 2+ MnO 2

Why is the freezing point of water set at 32ordmf why does

Why is the freezing point of water set at 32ºF? Why does the Fahrenheit scale start at 0º?

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen