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Authors
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Serrano, E. ; Tercjak, A. ; Ocando, C. ; Larranaga, M. ; Parellada, M. D. ; Corona, S. ; Mecerreyes, D. ; Zafeiropoulos, N.E. ; Stamm, M. ; Mondragon, I.
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Title
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Curing behavior and final properties of nanostructured thermosetting systems modified with epoxidized styrene-butadiene linear diblock copolymers
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Date
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01.11.2007
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Number
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15491
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Abstract
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Nanostructured thermosetting materials based on thermosetting matrices were prepared by modification of an epoxy system with linear PS-block-PB copolymers. The nanostructured thermosets were obtained through PS block segregation. Depending on the block-copolymer content in the thermosets and its epoxidation degree, the PS domains can display micellar, worm-like or hexagonally-packed cylinder structures, retaining the stiffness of the epoxy matrix, where the hexagonally cylindrical morphology lead to a significant increase in fracture toughness. The rheokinetics of microphase separation during network formation was investigated. Nanostructures are judged to be formed by polymerization-induced microphase separation, in marked contrast to equilibrium self-organized structures that are preformed, with the microphases fixed via a curing reaction.
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Publisher
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Macromolecular Chemistry and Physics
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Wikidata
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Citation
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Macromolecular Chemistry and Physics 2008 (2007) 2281-2292
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DOI
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https://doi.org/10.1002/macp.200700169
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Tags
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epoxidized sb block copolymers fracture kinetics rheology thermosetting epoxies oxide) triblock copolymers cross-linking polymer block-copolymers epoxy-resin gel point mechanical-properties phase-behavior poly(epsilon-caprolactone)-epoxy blends crystalliz
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