Polymers - Polymer Materials - Quiz, Exercises for Polymers. Birla Institute of Technology and Science

Polymers

Description: The main points are given below: Polymers, Two Broad Groups, Addition Polymerization, Degree of Polymerization, Number of Carbon Atoms, Hydrogen Atoms, Polymerization Methods, Alternating Structure, Graft Terpolymer, Polydispersity Distribution
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MFGT 141 HW#1 Name:_______________________ 1. Polymers can be classified in two broad groups. List the two groups and EXPLAIN the

definition of each. ______________________________ _________________________________________________________

_________________________________________________________ 2. List whether the following polymer is made from condensation or Addition polymerization

(C or A)? PP ______, Nylon 6 ______, ABS ______, PVC _____, HDPE _____, PS _____, ABS _____.

3. For a PP polymer with DP (degree of polymerization of 900), the number of carbon atoms is ___? If the polymer is saturated, the number of hydrogen atoms is ___?

4. Explain the two forms of polymerization methods are ______ and _______. And four

examples of each are: Method 1: ___________________________ Method 2: _____________________________________________

5. An example of the alternating structure(with the use of A & B & C) of a graft terpolymer is ______________________?

6. Given the following data, calculate the number average molecular weight, the weight average molecular weight, Calculate the Degree of polymerization, DP if the polymer is PVC, and lastly, discuss whether the polydispersity distribution is narrow or broad. Note: Narrow is if Mw/Mn < 5.0, and Broad is if Mw/Mn > 5.0

Mn= __________________, Mw= _________________, Degree of polymerization, DP = ____________, Polydispersity = __________ Example, PP Homework: PVC

Ni Mi NiMi NiMi2 Ni Mi NiMi NiMi2 1,000 1,000 1.00E+06 1.00E+09 1,000 100,000 2,000 4,000 8.00E+06 3.20E+10 3,000 200,000 4,000 8,000 3.20E+07 2.56E+11 4,000 700,000 7,000 3,000 2.10E+07 6.30E+10 8,000 300,000

10,000 1,000 1.00E+07 1.00E+10 9,000 100,000 24,000 17,000 72,000,000 3.62E+11

AMU= 44 Mn= 3.00E+03 AMU= Mn= Mw= 5.03E+03 Mw= Poly Disp

PS = 1.68E+00 Poly Disp

PS =

DP=Mn/amu 6.82E+01 DP=Mn/amu

7. Write out the polymerization reaction for nylon 6,6. Is it condensation or addition?

_____________________________

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8. Write out the polymerization reaction for polypropylene. Is it condensation or addition? _____________________________

9. Write the chemical structure for the following:

(i.) PEEK (ii.) Polysulfone (iii.) Nylon 6,12 iv.) PPS

10. What is the difference between thermoplastic and thermoset polyester, in terms of saturated and unsaturated? __________________________________________ __________________________________________________________________ b. Common trade names for thermoplastic and thermoset polyester are: thermoplastic = _____________________________________________________ thermoset =_________________________________________________________ 11. Explain how MW is related to melt index and viscosity? __________________

________________________________________________________________ ________________________________________________________________

12. Explain what processing factors affect the crystallinity of a polymer? ________

________________________________________________________________ ________________________________________________________________

13. What is an IPN and how is it different from crosslinking? _________________

________________________________________________________________ ________________________________________________________________

14. Four examples of additives are:

i. _________________ ii. _________________

iii. _________________ iv. _________________

15. What is the difference between a filler and a reinforcement and what are the forms of each? ___________________________________________________ ________________________________________________________________ ________________________________________________________________

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