Structure and Properties of a Semifluorinated Diblock Copolymer Modified Epoxy Blend

详细信息    查看全文

• 作者：Connie Ocando ; Elena Serrano ; Agnieszka Tercjak ; Cristina Pe&ntilde ; a ; Galder Kortaberria ; Cedric Calberg ; Bruno Grignard ; Robert Jerome ; Pedro M. Carrasco ; David Mecerreyes ; I&ntilde ; aki Mondragon
• 刊名：Macromolecules
• 出版年：2007
• 出版时间：May 29, 2007
• 年：2007
• 卷：40
• 期：11
• 页码：4068 - 4074
• 全文大小：618K
• 年卷期：v.40,no.11(May 29, 2007)
• ISSN：1520-5835

文摘

Novel nanostructured thermosetting materials have been prepared by modification of an epoxyresin with a semifluorinated diblock copolymer, poly(heptadecafluorodecyl acrylate)-b-poly(caprolactone), PaF-b-PCL. In a first step, the phase behavior and linear viscoelasticity of PaF-b-PCL were investigated. Accordingto the segregation regime, no order-order transitions were detected, being the order-disorder transition temperaturebeyond the degradation temperature. Atomic force microscopy (AFM) images of the block copolymer after differentthermal treatments revealed that self-assembly takes place into spherical nanodomains, which is consistent withthe copolymer composition. This block copolymer was further used to prepare a nanostructured thermoset blendwith an epoxy resin. DSC and DMA analysis reveals microphase separation of PaF block from the epoxy-richphase after curing. The PaF block self-assembled into wormlike and spherical micelles in the thermoset system.This nanostructured blend presented unique surface properties showing high hydrophobicity (ages/gifchars/upsilon.gif" BORDER=0 > = 109ages/entities/deg.gif">) and lowsurface energy (17 mN/m).