M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-2018
Polymer Chemistry
SELECTED TOPICS IN POLYMERS
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt in all five questions. Section I is compulsory. Attempt any two questions from section II. Attempt any two questions from section III. All questions carry equal mark. Figures to right indicate full marks. Use of log table non programmable calculator is allowed.
Section I
Q.1
Answer the following:
14
Give two examples of polymer showing LC behaviors.
List four advantages of good paints.
Give the synthesis of modified NaBH4 used as polymer support catalyst and draw its chemical structure.
What is purpose of antioxidant in rubber compounding? Give two examples of antioxidants.
Which polymers are used in membrane synthesis and contact lenses?
What are the special characteristics properties of solid phase peptide synthesis?
Name the products burring of polymer waste.
Section II
Q.2
Define the term compounding of rubber? Explain the role of filler, UV stabilizer and accelerator additives in the compounding of rubber. Give two each suitable examples of filler, UV stabilizer and accelerator.
07
In brief, discuss the use of polymers in medicines and LCP applications.
07
Q.3
In brief, discuss the esterification process of cellulose with their properties and uses.
07
What is Merrifield Resin? How it is synthesized in laboratory? Discuss the synthesis of polypeptides using Merrifield resin with suitable examples.
07
Q.4
Illustrate the synthetic method for Nitrile Rubber and mention its properties and applications.
07
What is lithography; In brief explain the positive mode of working of a photo resist. Draw a suitable diagram.
07
Section III
Q.5
Explain Hydrogenation of polystyrene and applications of hydrogenated polystyrene.
05
Recently it has been claimed that Fuel can be recovered from plastic waste. Describe the process in detail.
05
Discuss the chlorination of natural rubber and write down important properties and applications of chlorinated natural rubber.
04
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SLR-VF-159
Q.6
What are silicones? Explain the synthesis and properties for silicon elastomers.
05
Draw the flow diagram for paint manufacturing and discuss the various constituent involved in paint formulation.
05
Discuss the use of coding system in sortation of waste polymers.
04
Q.7
Write a note on any Three of the following.
14
Flame retardant and blowing agent
Conducting Polymers
Cellulose Ether Derivatives
Microsortation
Flory Rehner Equation