f2 fs2 fc0 sc0 ls1 ws1">
Propagation
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K. PRAJAPATI ET AL.
Copyright © 2011 SciRes. IJOC
67
Termination
Table4. Composition of terpolymer.
Monomer composition
Sample No. Monomer feed
(F)
Polymer feed
(f) % Conversion Mole fraction
of [Sty]*
Mole fraction of
[VA]**
Mole fraction of
[AN]***
03 1.43 1.4 10.6 1.44 1.44 2.01
06 2.00 1.9 7.02 0.28 1.44 2.01
09 0.85 0.98 15.6 2.59 1.44 2.01
10 0.71 0.37 9.1 1.44 0.72 2.01
12 2.88 2.31 14.3 1.44 2.88 2.01
13 2.14 1.8 5.6 1.44 1.44 1.00
15 1.074 0.96 15.7 1.44 1.44 4.02
*Calculated from peaks due to phenyl proton. **Calculated from peaks due to acetoxy proton; ***Calculated from nitrogen percent via elemental analy-
sis; [p-NBTPY] = 33.6 × 10–6 mol L–1, temperature = 65˚C ± 1˚C, Time = 150 min.
Figure 17. ESR spectrum of terpolymer sampl e No. 3.
Figure 16. Kelen-Tüdos plot of terpolymer for determina-
tion of reactivity ratio.
capable of initiating the polymerization of (Sty-co-AN-
co-VA) in dioxane solution giving in alternating ter-
polymer without using Lewis acid. The formation of
terpolymer is confirmed by the FTIR spectra showing
bands at 3030 cm–1, 1598 cm–1, and 2362 cm–1, confirm-
ing the presence of phenyl, acetoxy and nitrile group
respectively. SEM confirms the polymer to be phospho-
rus free. E.S.R. spectra confirms phenyl radical respon-
sible for initiation.The DSC studies evidenced the glass
transition temperature of terpolymers as 149.5˚C.
with the value given for free radical polymerization. The
spectra shows[28] six hyperfine lines and hyperfine con-
-stant as 3.74 (G) . The free radical mode of polymeriza-
tion was also confirmed by the inhibitory effect of hy-
droquinone on the rate of polymerization.
4. Conclusions
p-nitrobenzyltriphenyl phosphonium ylide (p-NBTPY)is
K. PRAJAPATI ET AL.
68
5. Acknowledgements
The authors are grateful to the Dr. Meeta Jamal, Princi-
pal Dayanand Girls College, Kanpur, India for providing
necessary facilities, Dr. A. Varshney is thankful to
U.G.C. New Delhi for sanctioning the project entitled
“Polymerization of vinyl monomers using ylide and
metal ylide complexes as new radical initiators
(F.12-5/2004 (SR)).
One of the author (K.P.) is thankful to the Under Sec-
retary, Uttar Pradesh Shasan, India for sanctioning the
study leave to conduct this research.
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Analysis Report
General Conditions
Result File : Terpolymer
File Version : 1
Background Method : Auto
Decon Method : Gaussian
Decon ChiSquared : 11.18
Analysis Date : 19-March-2005
Microscope : SEM
Comments :
A. ANALYSIS CONDITIONS
Quant. Method : XPP/ASAP
Acquire Time : 50 sec
Nationalization Factor : 100.00
B. SAMPLE CONDITIONS
Kv : 15.0
Beam Current : 137.9 picoAmps
Working Distance : 25.0 mm
Tilt Angle : 0.0 Degrees
Take Off Angle : 35.0 Degrees
Solid Angle *Beam Current : 1.2
Element Line Weight% K-Ratio Decon Region Cnts/s Atomic%
P Ka 0.00 0.0000 0.000 - 0 0.00 0.00
Cu Ka 4.03 0.0528 7.660 - 8.430 25.99 10.77
Pd La 1.30 0.0090 2.640 - 3.040 16.47 2.08
Au La 91.54 0.8896 9.220 - 10.13 41.58 79.00
Zn Ka 3.14 0.0429 8.230 - 9.030 15.51 8.15
Total 100.01