Polymers - Polymer Materials - Quiz, Exercises for Engineering Chemistry. Birla Institute of Technology and Science
pankita
pankita17 April 2013

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

PDF (94 KB)
2 pages
1000+Number of visits
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, Pol...
20points
Download points needed to download
this document
Download the document
Preview2 pages / 2
Download the document

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?

_____________________________

Docsity.com

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? ___________________________________________________ ________________________________________________________________ ________________________________________________________________

Docsity.com

comments (0)
no comments were posted
be the one to write the first!
Download the document