Nanostructuration of Unsaturated Polyester by All-Acrylic Block Copolymers, 1 - Use of High-Molecular-Weight Block Copolymers

✍ Scribed by Elena Serrano; Pierre Gerard; Frederic Lortie; Jean-Pierre Pascault; Daniel Portinha

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 478 KB
• Volume: 293
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200800156

✦ Synopsis

Abstract

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.

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