M.Sc. (Semester III) Examination Nov/Dec-2018
Polymer Chemistry
SPECTRAL AND INSTRUMENTAL ANALYSIS OF POLYMERS
Time: 2½ Hours Max. Marks: 70
Instructions: Attempt all questions.
Use of log table and calculators is allowed.
Draw neat and labeled diagrams wherever necessary.
Q.1 Multiple choice questions 14
Infra- red spectral analysis of polymer gives information of
Molecular Weight Functional Groups
Tg Tm
UV- Visible spectral analysis of polymer gives information of
Tg Unsaturations
Molecular Weight All of above
Thermal stability of polymer is estimated by
XRD UV Spectra
TGA None of above
IR spectra stretching band at 1700 cm-1 corresponds to
Proton Carbon
Carbonyl Group Hydroxyl Group
Raman Spectroscopy is used for determination.
Molecular Weight Functional Groups
Thermal Stability None of above
Signal of carbon in benzene (chemical shift, ppm value) using CMR will
appear at
70 130
100 50
POM analysis of polymer is used to estimate
Functional Groups Molecular Weight
Tg Spherulites
AFM analysis of polymer is used to estimate
Tg Surface Pattern
Thermal Stability All of above
XPS analysis of polymer is used to estimate
Crystallinity Surface Pattern
Elemental Composition Both b and c
10) MALID-TOF analysis of polymer is used to estimate
Tm Molecular Weight
Crystallinity Elemental Composition
11) DSC analysis of polymer is used to estimate
Change in dimensions against temperature
Molecular Weight
Viscosity
Tensile Strength
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SLR-VW-45
12) Optical microscopic analysis of polymer results
2D morphology 3D morphology
Tg All of the above
13) In SEM and TEM source of illumination used is
Light Electrons
X-rays Infra Red
14) AFM analysis of polymer sample can be done using following method
Tapping Mode Contact Mode
Both Contact Tapping Methods Dip Method
Q.2 Answer the following (any four) 08
Explain the basic difference between FAB-MS technique and MALDITOF
technique.
Give the importance of DTA technique in the analysis of polymer?
Write down any four advantages of MALDI-TOF technique.
What is the importance of 2D NMR analysis in chemistry?
Give the basic difference between Laue's diffraction and Powder
diffraction method.
Write notes on (any two) 06
Use of deturated solvents in NMR.
Principal and applications of TMA in polymer analysis.
Theory of Bragg's equation with applications in polymer analysis.
Q.3 Answer the following (any two) 08
Discuss the applications of TEM towards polymer analysis.
What is chemical shift? Explain with suitable example.
Explain the principal and applications of ATR analysis in polymer
kinetics.
Answer the following (any one) 06
Give the difference between Infra red and Raman Spectroscopy.
Discuss the Pyrolysis GC-MS technique with suitable diagram.
Q.4 Answer the following (any two) 10
How samples are prepared for SEM analysis of polymer?
Discuss the usefulness of AFM analysis in polymer science.
Discuss the basic difference between TGA and DTA technique in
analysis of polymer.
Answer the following (any one) 04
What is TMS? Draw its structure and give its importance in NMR
spectrum analysis.
Why the aromatic proton signals appear after approximately seven delta
value?
Q.5 Answer the following (any two) 14
Explain the use of IR technique to check the solubility of polymer blends.
How the Crystallinity of the polymer is determined using XRD with suitable
example?
Discuss the sterioregularity in polybutadiene using solid state CMR
technique.