Department of Materials Science University of Milano - Bicocca

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Department of Materials Science University of
Milano - Bicocca
Simonutti Research Group
Polymer Synthesis and Characterization
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Block Copolymers
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Polystyrene-block-poly(ethylene-co-but-1-ene)-bloc
k-polystyrene Triblock Copolymer (SEBS)
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Confined Crystallization in the lamellar phase of
SEBS
13C Mas spectra at 700 MHz
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Nanoporous Polymeric Monoliths
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Strategies for Block Copolymers Synthesis

• Living Anionic Polymerization
• Living Radical Polymerization
• RAFT (Reversible additionfragmentation chain
  transfer polymerization)
• 2) ATRP (Atom Transfer Radical Polymerization)

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Reversible AdditionFragmentation chain Transfer
polymerization
Rizzardo et al. Macromolecules 1999, 32, 6977-80
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Time-domain NMR

• typical FID of a liquid or a rubber T2 0.51
  ms (1/pT2 0.5 kHz)
• shim- (B0 homogeneity-) limited!
• compare Ds 5 ppm º 20 MHz 5 ppm 100 Hz!

Chemical Shift? Undetectable!

most important aspect initial FID intensity
integrated signal!
FT
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Polymer Morphology as Studied by TD NMR
Amorphous phase (above Tg)
Crystalline Phase
10-1000 Hz
20 kHz
frequency domain
time domain
500 ms
10 ms
two-component decay
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Morphology of High Impact PP as Studied by NMR
Imaging
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Collaborations
Sinthesys of Block Copolymers M. Hillmyer, U.
Minnesota High Field NMR L. Emsley, Ecole
Normale Superior, Lyon Low Field NMR K.
Saalwaechter, M Mauri, U. Halle NMR Imaging
A. Pines, U.C. Berkeley
Industrial Partners Pirelli Tyres, Polimeri
Europa, Rhodia, Bruker Biospin,