M.Sc. (Semester III) (CBCS) Examination Nov/Dec-2018
Polymer Chemistry
BASIC CONCEPTS OF POLYMERIZATION
Time: 2½ Hours
Max. Marks: 70
Instructions: All questions are compulsory. All questions carry equal marks.
Q.1
Multiple choice questions.
14
Example of head-to-head structure
PVC
PET
PBT
PEN
Driving force for ring opening reaction is
Stress
Elastic
Strain
Newton force
Three member rings are unstable due to
Ring strain
Stress
Elastic
All of above
is the example of a retarder.
Ether
Methanol
Nitro benzene
Acetone
type of monomers undergo anionic polymerization
EDG with monomer
EWG with monomer
Both a and b
None of the above
Function of Inhibiter is to
Terminate reaction
Initiate reaction
Propagate reaction
Increase reaction rate
Examples of styrene based copolymers
SBR
SAN
Both and b
Only, a
Example of isotactic polymer is
PBT
PS
PEN
All of above
Tacticity of polymer depend on
Chiral carbon
Achiral carbon
Does not depend on sterochemical mode
Both a and b
10) is the example of redox initiator
Ferrous ion
Potassium ion
Hydrogen ion
All of the above
11) Polymerization of ethylene is
exothermic
endothermic
depends on reaction condition
all of above

12) Which of the following is an example of addition reaction?
Polyethylene
Polystyrene
Polyacrolynitrile
All of above
13) Which type of copolymer shown by GTP?
Block copolymer
Graft copolymer
Alternate copolymer
Random copolymer
14) Which type of catalyst involved in ROP Metathesis polymerization?
Transition metal
Lewis acid
Lewis base
Alkyl metal
Q.2
a)Answer the following (Any Four)
08
Give two examples of redox initiation reaction
Define reactive ratio
Give two examples of ionizing radiations used in polymerization
Predict the product and name the reaction
RX+R Pd base
Give one example of cyclosiloxane and its ROP product

Write notes on (Any Two)
06
Mechanism of initiation by free radical redox initiator
Non linearity in polycondension reaction
Assumption for concept of equal reactivity of functional group
Q.3
a)Answer the following (Any Two)
08
What is polycondensation? Explain with suitable example.
Give types of copolymer with example.
Explain the kinetic equation for monomer reactivity ratio in copolymers
b)Answer the following (Any One)
06
Derive the kinetic equation for polyesterification in presence of conc. H2SO4
Explain the autoacceleration with suitable example.
Q.4
a)Answer the following (Any Two)
10
Derive kinetic equation of polyesterification in absence of catalyst
Write a note on hyper branched polymer
Explain Q-e scheme.
b)Answer the following (Any One)
04
Explain Suzuki reaction with generalized reaction.
Explain the mechanism of cationic ROP of cyclic ethers
Q.5
Answer the following (Any Two)
14
a)How the rate of polymerization is determined experimentally by radical chain?
b)Give the mechanism of ring opening metathesis polymerization
c)Give the mechanism of group transfer polymerization