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Morphology and mechanical properties of epoxy resins containing functionalized perfluoroether oligomers
Author(s) -
Mascia L.,
Zitouni F.,
Tonelli C.
Publication year - 1995
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760351302
Subject(s) - materials science , epoxy , flexural strength , curing (chemistry) , composite material , bisphenol a , flexural modulus , toughness , ductility (earth science) , fracture toughness , morphology (biology) , creep , biology , genetics
Chain extended perfluoroether oligomers were found to be miscible with bisphenol epoxy resins at all concentrations. These were evaluated as modifiers for anhydride cured resin systems, taking advantage of the carboxylic acid functionality at the chain ends. By altering the mixing and curing procedure different two‐phases morphologies could be obtained varying from fine co‐continuous networks, which produced transparent castings, to opaque systems consisting of precipitated heterogeneous particles. While the T g and flexural modulus were found to be slightly lower than the control cure resin, the addition of the fluoroligomer modifier produced large increases in flexural strength, ductility, and fracture toughness. Samples with an IPN type morphology were found to exhibit an increase in ductility after aging at 200°C for three weeks proportionally to the concentration of fluoroligomer used.