Essentials of Materials Science and Engineering, SI Edition
Essentials of Materials Science and Engineering, SI Edition
4th Edition
ISBN: 9781337672078
Author: ASKELAND, Donald R., WRIGHT, Wendelin J.
Publisher: Cengage Learning
Question
Book Icon
Chapter 16, Problem 16.16P
Interpretation Introduction

Interpretation:

The molecular weights of all the repeat units of the polymers given in table 16.3 are to be calculated.

Concept Introduction:

The formula to calculate the molecular weight of a repeat unit is:

  (MW)repeat unit=iaiEi ..... (1)

Here, ai is the stoichiometric number of element Ei present in the repeat unit.

Expert Solution & Answer
Check Mark

Answer to Problem 16.16P

The molecular weights of all the repeat units of the polymers given in table 16.3 are:

1. Polyethylene ([C2H4]), (MW)repeat unit=28 g/mol

2. Polyvinyl chloride ([C2H3Cl]), (MW)repeat unit=62.5 g/mol

3. Polypropylene ([C3H6]), (MW)repeat unit=42 g/mol

4. Polystyrene ([C8H8]), (MW)repeat unit=104 g/mol

5. Polyacrylonitrile ([C3H3N]), (MW)repeat unit=53 g/mol

6. Polymethyl methacrylate ([C5H8O2]), (MW)repeat unit=100 g/mol

7. Polychlorotrifluoroethylene ([C2F3Cl]), (MW)repeat unit=116.5 g/mol

8. Polytetrafluoroethylene ([C2F4]), (MW)repeat unit=100 g/mol

Explanation of Solution

Name of all the polymers and molecular formula of their repeat units from table 16.3 are:

1. Polyethylene ([C2H4])

2. Polyvinyl chloride ([C2H3Cl])

3. Polypropylene ([C3H6])

4. Polystyrene ([C8H8])

5. Polyacrylonitrile ([C3H3N])

6. Polymethyl methacrylate ([C5H8O2])

7. Polychlorotrifluoroethylene ([C2F3Cl])

8. Polytetrafluoroethylene ([C2F4])

Use equation (1) to calculate the molecular weight of the repeat unit of all the polymers as:

1. Polyethylene ([C2H4])

  (MW)[ C 2 H 4]=(2×C)+(4×H)=(2×12)+(4×1)=28 g/mol

2. Polyvinyl chloride ([C2H3Cl])

  (MW)[ C 2 H 3Cl]=(2×C)+(3×H)+(1×Cl)=(2×12)+(3×1)+(1×35.5)=62.5 g/mol

3. Polypropylene ([C3H6])

  (MW)[ C 3 H 6]=(3×C)+(6×H)=(3×12)+(6×1)=42 g/mol

4. Polystyrene ([C8H8])

  (MW)[ C 8 H 8]=(8×C)+(8×H)=(8×12)+(8×1)=104 g/mol

5. Polyacrylonitrile ([C3H3N])

  (MW)[ C 3 H 3N]=(3×C)+(3×H)+(1×N)=(3×12)+(3×1)+(1×14)=53 g/mol

6. Polymethyl methacrylate ([C5H8O2])

  (MW)[ C 5 H 8 O 2]=(5×C)+(8×H)+(2×O)=(5×12)+(8×1)+(2×16)=100 g/mol

7. Polychlorotrifluoroethylene ([C2F3Cl])

  (MW)[ C 2 F 3Cl]=(2×C)+(3×F)+(1×Cl)=(2×12)+(3×19)+(1×35.5)=116.5 g/mol

8. Polytetrafluoroethylene ([C2F4])

  (MW)[ C 2 F 4]=(2×C)+(4×F)=(2×12)+(4×19)=100 g/mol

Conclusion

The molecular weights of all the repeat units of the polymers given in table 16.3 are:

1. Polyethylene ([C2H4]), (MW)repeat unit=28 g/mol

2. Polyvinyl chloride ([C2H3Cl]), (MW)repeat unit=62.5 g/mol

3. Polypropylene ([C3H6]), (MW)repeat unit=42 g/mol

4. Polystyrene ([C8H8]), (MW)repeat unit=104 g/mol

5. Polyacrylonitrile ([C3H3N]), (MW)repeat unit=53 g/mol

6. Polymethyl methacrylate ([C5H8O2]), (MW)repeat unit=100 g/mol

7. Polychlorotrifluoroethylene ([C2F3Cl]), (MW)repeat unit=116.5 g/mol

8. Polytetrafluoroethylene ([C2F4]), (MW)repeat unit=100 g/mol

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Qu 1 If crank OA rotates with an angular velocity of ω = 12 rad/s, determine the velocity of piston B and the angular velocity of rod AB at the instant shown. please show all work
Q2/ Maria has an online shop where she sells hand made paintings and cards. She sells the painting for 50 and the card for 20. It takes her 2 hours to complete 1 painting and 45 minutes to make a single card. She also has a day job and makes paintings and cards in her free time. She cannot spend more than 15 hours a week to make paintings and cards. Additionally, she should make not more than 10 paintings and cards per week. She makes a profit of 25 on painting and 15 on each card. How many paintings and cards should she make each week to maximize her profit.
Please no AI response.
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
MATLAB: An Introduction with Applications
Engineering
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Text book image
Essentials Of Materials Science And Engineering
Engineering
ISBN:9781337385497
Author:WRIGHT, Wendelin J.
Publisher:Cengage,
Text book image
Industrial Motor Control
Engineering
ISBN:9781133691808
Author:Stephen Herman
Publisher:Cengage Learning
Text book image
Basics Of Engineering Economy
Engineering
ISBN:9780073376356
Author:Leland Blank, Anthony Tarquin
Publisher:MCGRAW-HILL HIGHER EDUCATION
Text book image
Structural Steel Design (6th Edition)
Engineering
ISBN:9780134589657
Author:Jack C. McCormac, Stephen F. Csernak
Publisher:PEARSON
Text book image
Fundamentals of Materials Science and Engineering...
Engineering
ISBN:9781119175483
Author:William D. Callister Jr., David G. Rethwisch
Publisher:WILEY