Veer Narmad South Gujarat University 2010-3rd Sem B.E Polymer Chemistry ( old Scheme ) - 2 ( ) ( T.T & T.P ) - Question Paper
RN-6289
B. E. II (Sem. Ill) (T.P. / T.T.) Examination May/June - 2010 Polymer Chemistry (Old Scheme)
Time : 3 Hours]
[Total Marks : 100
Instruction :
Seat No.:
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Fillup strictly the details of signs on your answer book.
Name of the Examination :
B. E. 2 (Sem. 3) (T.P./T.T.)
Name of the Subject:
Polymer Chemistry (Old Scheme)
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-Subject Code No.: |
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-Section No. (1,2,.....): 1&2 |
(2) Answers to the two sections must be written in separate answer books.
Student's Signature
(3) Figures to the right indicate full marks.
(4) Tie two sections separately.
SECTION I
Q.l a) Answer the following objective questions. (10)
i) What are phenolics?
ii) State one draw back of Kevlar fibres.
iii) Poly acrylamide is soluble in water.-True or false, if false suggest suitable solvent.
iv) Poly m-phenylene iso phthalamide is nothing but-----------------------.
v) What is action of caustic boil on polyester?
vi) Fully aliphatic polyesters have very limited applications.-True or False.
vii) Give an example of amino acid based raw material of nylon.
viii) Natural rubber is obtained from-------------of rubber tree.
ix) The process by which a network of cross links is introduced in rubber is called as------------------------.
x) ------------------------is repeat unit of starch.
b) Describe elaborately the techno-chemical aspects of polyacrylamide. (10)
Q.2 a) Describe various methods of disposal of polymers. (10)
OR
Q.2 Describe in detail the manufacturing, properties and applications of urea (15)
formaldehyde and melamine formaldehyde resins.
Q.3 Write short notes on any three of the following (15)
a) Silicone Elastomers
b) Butyl Rubber
c) Foaming
d) HDPE
SECTION II
Q.4 a) Answer the following objective questions: (10)
i) Polymer chloride finds extensive use in certain formulations called _and_.
ii) __is known as Teflon.
iii) When two repeat units are distributed alternately through the chain the polymer is called_Copolymer.
iv) Natural rubber is a highly ______and _______ material.
v) Polyvinyl acetate is______with an alkali to give polyvinyl
alcohol.
vi) The___ groups present in a polymer may be converted to__
groups by reduction.
vii) The_process was dissevered by Goodyear in 1839.
b) Explain Emulsion polymerization in detail. (05)
c) Explain about X- Ray diffraction method for testing of polymers. (05)
Q.5 a) Derive the following equation and draw suitable diagram (10)
m=TkY-
C,0->O
b) Explain Addition & substitution reaction in detail. (05)
Q.5 a) What is Mark - Hauwink equation? Explain Viscometric method with (10) diagram.
b) What do you understand by IR spectroscopic method? (05)
Q.6 Write short notes on any four of the following. (15)
a) Bulk polymerisation
b) Hydrogenation reaction.
c) Cyclization reaction.
d) Cross linking reaction.
e) Acidolysis reaction
g) Number Average Molecular Weight.
RN-6289] 3 [ 100 ]
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