Download SGBAU B-Tech 7th Sem Poly Plast Structure Property Relationship In Polymers Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 7th Sem Poly Plast Structure Property Relationship In Polymers Previous Question Paper

B.'l?ech. Seventh Semester (Polymer (Plastic) Technology) (CGS)
11136 : Structure Property Relationship in Polymers : 7 PP 03
P. Pages: 2 IIIIIWIIII AW - 3385
Time : Three Hours . o 2519. Max. Marks : 80
Notes : Answer three question from Section A and three question from Section B.
a)
b)
a)
b)
a)
b)
a)
b)
a)
b)
b)
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2 Due credit will be given to neamess and adequate dimensions.
3. Diagrams and chemical equations should be given wherever necessary.
4. Illustrate your answer necessary with the help of neat sketches.
5 Discuss the reaction, mechanism wherever necessary.
6 Use of pen Blue/Black ink/re?ll only for writing the answer book.
SECTION - A
What do you mean by ?exibility of polymer chain? Explain van'ous factors ailbcling
?exibility.
Classify polymers on the basis of chemical constitution.
0R
Explain the practical importance of polymer chain ?exibility.
Discuss the forces affecting internal rotation of polymer chain.
Discuss molecular aggregation and stable state of assemblage in super molecular structure.
Explain structure of amorphous polymer.
0R
Explain X-ray diffraction pattern for amorphous and crystalline polymers.
What do you mean by super molecular structure in case of polymer?
De?ne glass transition temperature and state its signi?cance.
What does crystallization mean? Explain kinetics of crystallization.
OR
De?ne equilibrium melting temperature and explain its determination.
Explain the mechanism of crystallization.
SECTION - B
Explain the morphology of crystalline polymers with suitable example.
Explain structure of polymer crystallized ??om morphology.
10

10.
ll.
12.
b)
a)
b)
a)
b)
b)
a)
b)
OR
Explain the effect 01? spherulites on the properties ofpolymer material.
Explain structure formation during polymer processing.
Explain the effect 01? \ arious factors on crystalline melting point.
Explain the effect ofmnlccular weight and ?ller on mechanical strength of polymers.
OR
Explain the effect of chemical constitution and stereo-regularity of polymer on electrical
properties of polymer.
What does mechanical strength and lifc time of polymer mean?
Discuss the property requirement for clastomers and ?bres.
W hat does liquid crystalline polymers mean? State its applications.
OR
Explain polymer sorbcms and porous structure of polymers.
State the various applications of polymcrs in optical and electrical ?eld.
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