# 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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