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This document is downloaded from DR‑NTU (https://dr.ntu.edu.sg)Nanyang Technological University, Singapore.
Macromolecular Architectural Control via NewPolymer Synthetic
Seah, Eliora Wan Yin
2016
Seah, E. W. Y. (2016, March). Macromolecular Architectural Control via New PolymerSynthetic. Presented at Discover URECA @ NTU poster exhibition and competition,Nanyang Technological University, Singapore.
https://hdl.handle.net/10356/84145
© 2016 The Author(s).
Downloaded on 27 Aug 2021 22:00:07 SGT
Category: Physical and Biological Sciences Student: Eliora Seah Wan Yin (Xie Wan Yin) Project ID: SPMS15052School of Physical and Mathematical Sciences
Project Title: Macromolecular Architectural Control via New Polymer SyntheticSupervisor: Assoc Prof Atsushi Goto Co-Supervisor: Dr Xiao Long Qiang
Azo Compound – V501
Results & Discussion
Chain-end functional polymers were successfully synthesized from functional initiators.
Dual chain-end functional polymers were successful synthesized by chain-end transformation.
Other monomers, such as 2-Methyloxyethyl Acrylate (MEA) and 2-Hydroxyethyl Methacrylate (HEMA), can be explored and these polymers can potentially be used for medical applications.
Macromolecular Architectural Control via New Polymer Synthetic
URECA
Undergraduate Research Experience on CAmpus
IBMH PAMO
= =
Polymerization of MMA from R-N=N-R
Polymerizations of Methyl Methacrylate (MMA)
MMA
0 20 40 600
2
4
6
8
Theoretical line
Mn / 1
000
conversion / %
1.0
1.1
1.2
1.3
1.4
1.5
Mw/M
n
Conclusions
URECA
Undergraduate Research Experience on CAmpus
Robust
monomer
R-N=N-R
I2
Catalyst
R-N=N-R 2R-II2
Alkyl Iodide
[MMA]0 = 8 M (100 eq)[I2]0 = 80 mM (1 eq)[BNI]0 = 80 mM (1 eq)[V501]0 = 200 mM (40 eq)80 oC
Chain-end transformation of PMMA-I
[PMMA]0 = 80 mM (1 eq)[NH2CH2CH2Ph]0 = 800 mM (10 eq)100 oC
0 1 2 3 4 5 6 70.0
0.1
0.2
0.3
0.4
0.5
0.6
ln ( [M
] 0 / [M
] )
t / h0 10 20 30 40 50 60
0
1
2
3
4
Theoretical line
Mn /
100
0conversion / %
1.0
1.1
1.2
1.3
1.4
1.5
Mw/M
n
UV/ heat
UV/ heat
Organocatalyzed Controlled Radical Polymerization
Polymer-I + catalyst Polymer + I・・・catalyst
Functional Group 1 Functional Group 2
Attractive features: Inexpensive & Little toxic & Easy to handle
This work- Syntheses of chain-end functional polymers
organic catalyst
Bu4NI (BNI)
alkyl iodide
monomer
Possible Applications
ka
kda
Introduction
co
nve
rsio
n / %
40
30
20
10
0 1 2 3 4 5 60.0
0.2
0.4
0.6
0.8
1.0
ln ( [M
] 0 / [M
] )
t / h
60
50
30
10
co
nv
ers
ion
/ %
[MMA]0 = 8 M (100 eq)[PAMO]0 = 80 mM (1 eq)[BNI]0 = 80 mM (1 eq)[V501]0 = 200 mM (40 eq)80 oC
Low polydispersity
Low polydispersity
Chain-end Functionality
Effective chain-end transformation
URECA
Undergraduate Research Experience on CAmpus
www.ntu.edu.sg/ureca
2R + N2
URECA
Undergraduate Research Experience on CAmpus
www.ntu.edu.sg/ureca
URECA
Undergraduate Research Experience on CAmpus
www.ntu.edu.sg/urecawww.ntu.edu.sg/ureca
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