Demixing behaviour as a tool to control the morphology of thermoplast modified epoxy resins
- Univ. of Twente (Netherlands)
Thermoplast modified epoxy resins find application for instance as matrices for composites. In this work, a strategy was developed to vary the morphology of thermoplast modified resins systematically and to establish a relationship between the demixing behavior (demixing temperature and viscosity) of solutions of polysulphones in an uncured epoxy resin and the resulting morphology and mechanical properties of the cured resins. Changes in the demixing behavior of the solutions during curing were determined by means of non- reactive epoxy model compounds. Control of the demixing temperature and the initial viscosity of solutions of a polymer in a resin formulation (by variation of the thermoplast, the average epoxide molecular weight, the hardener, and by addition of accelerators) allowed to vary the final morphology and properties over a wide range. Increased impact toughness was obtained when a highly demixed, cocontinuous, morphology was formed at thermoplast concentrations {>=}20 wt% after curing at high temperature.
- OSTI ID:
- 127043
- Report Number(s):
- CONF-950402-; TRN: 95:006086-1137
- Resource Relation:
- Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of 209th ACS national meeting; PB: 2088 p.
- Country of Publication:
- United States
- Language:
- English
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