Abstract
PnBMA is grafted on PVDF using ATRP in NMP solution at 90 degrees C and characterized by means of 1D and 2D NMR. F-19 NMR spectra clearly reveal that the attack occurs on the head-head >CF2 groups. Cast PB films show a honeycomb-patterned porous microstructure, and the "breath-figure" model is used to explain pore formation. FT-IR spectra suggest a supramolecular interaction between >C=O groups of PnBMA and >CF2 groups of PVDF. Storage modulus, loss modulus and stress at break decrease with graft conversion, but the strain at break increases significantly. The toughness of the copolymers also increases dramatically (882%). The porous materials can be applied as solid-state electrolytes (Li+-doped) with good ionic conductivity (10(-5) S.cm(-1)).
Original language | English |
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Pages (from-to) | 134-149 |
Number of pages | 16 |
Journal | Macromolecular Chemistry and Physics |
Volume | 212 |
Issue number | 2 |
DOIs | |
Publication status | Published - 18 Jan 2011 |
Publication type | A1 Journal article-refereed |
Keywords
- ATRP
- graft copolymers
- Li+ ion conductivity
- mechanical properties
- porous morphology
- TRANSFER RADICAL POLYMERIZATION
- GRAFT COPOLYMER
- BREATH FIGURE
- SURFACE MODIFICATION
- POLYSTYRENE FILMS
- CHAIN STRUCTURE
- FLUORIDE)
- MEMBRANES
- POLYMERS
- ELECTROLYTES