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Multifunctional Porous Poly(vinylidene fluoride) ‐graft‐ Poly(butyl methacrylate) with Good Li + Ion Conductivity
Author(s) -
Samanta Sanjoy,
Chatterjee Dhruba P.,
Layek Rama K.,
Nandi Arun K.
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000472
Subject(s) - materials science , polymer chemistry , methacrylate , ionic conductivity , conductivity , copolymer , dynamic mechanical analysis , porosity , chemical engineering , composite material , electrolyte , polymer , chemistry , electrode , engineering
PnBMA is grafted on PVDF using ATRP in NMP solution at 90 °C and characterized by means of 1D and 2D NMR. 19 F NMR spectra clearly reveal that the attack occurs on the head‐head >CF 2 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 >CO groups of PnBMA and >CF 2 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 ).