Controlling the morphology in epoxy/thermoplastic systems

Autor: Eléonore Mathis, Marie-Laure Michon, Claude Billaud, Caroll Vergelati, Nigel Clarke, Jacques Jestin, Didier R. Long
Přispěvatelé: Laboratoire Polymères et Matériaux Avancés (LPMA), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), SOLVAY Res & Innovat Ctr Lyon, Solvay S.A., Solvay (France), Solvay Composite Materials (SCM), Department of Physics and Astronomy [Sheffield], University of Sheffield [Sheffield], Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), LLB - Matière molle et biophysique (MMB), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: ACS Applied Polymer Materials
ACS Applied Polymer Materials, 2022, 4, pp.2091-2104. ⟨10.1021/acsapm.1c01917⟩
ACS Applied Polymer Materials, 2022, 4 (3), pp.2091-2104. ⟨10.1021/acsapm.1c01917⟩
ISSN: 2637-6105
Popis: International audience; Thermosets are frequently toughened by a high-T g thermoplastic (TP). Blend morphologies, obtained by curing induced phase separation with scales of a few hundreds of nanometers are relevant for highperformance applications, but no quantitative description for obtaining these morphologies exist yet. We propose such a quantitative approach for predicting and controlling the final morphology. The key is the degree of curing and the corresponding T g of the blend and of both phases when phase separation takes place. It is controlled by the Flory interaction parameter  of the constituents and their respective T g 's. We show that if phase separation takes place too early during curing, the T g is too low and morphologies grow to reach sizes of a few micrometers, or more. Our study of different systems allows us to propose the relevant range of Flory interaction parameter  and temperature window T-T g for which the sizes of interest may be obtained. Our work opens the way for devising thermoplasticsthermosets couples with the appropriate affinity and T g s in order to make blends with tailored morphologies.
Databáze: OpenAIRE
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