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Nanostructuration of Unsaturated Polyester by All‐Acrylic Block Copolymers, 1 ‐ Use of High‐Molecular‐Weight Block Copolymers
Author(s) -
Serrano Elena,
Gerard Pierre,
Lortie Frederic,
Pascault JeanPierre,
Portinha Daniel
Publication year - 2008
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200800156
Subject(s) - copolymer , thermosetting polymer , materials science , miscibility , polyester , polymer chemistry , amphiphile , composite material , polymer , chemical engineering , engineering
Nanostructuration of maleate and orthophthalic unsaturated polyester (UP) resins was achieved by the use of high molecular weight amphiphilic PBA‐ b ‐P(MMA‐ co ‐DMA) 2 triblock copolymers. PBA is fully immiscible in cured UP resins, and the miscibility of P(MMA‐ co ‐DMA) random copolymers can be ensured with a minimum DMA content of 12 mol‐%. When using the triblock copolymers, fully transparent and nanostructured thermosets are obtained with a minimum DMA content in the outer blocks; the value of which is higher than 12 mol‐% and depends on the UP chemical structure. Finally, the fracture toughness of nanostructured thermoset was evaluated: for a triblock copolymer content as low as 5 wt.‐%, a 50% increase of K Ic was obtained, as compared to the neat thermoset.