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Thermomechanical and morphological properties of epoxy resins modified with functionalized hyperbranched polyester
Author(s) -
Blanco I.,
Cicala G.,
Faro C. Lo,
Motta O.,
Recca G.
Publication year - 2006
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.20604
Subject(s) - epoxy , materials science , polyester , rheology , composite material , monomer , viscosity , polymer blend , polymer , phase (matter) , copolymer , organic chemistry , chemistry
Thermomechanical and morphological properties of blends of epoxy monomers and hydroxyl and epoxy functionalized hyperbranched polyesters have been studied. Different properties of the blends were found by changing the cure cycles (a precure step followed by a postcure at higher temperature). All the blends showed phase separation with a particulate morphology. Through the addition of the hydroxyl‐ended modifiers, rather than the epoxy‐ended, an increase of the viscosity and of the reactivity of the uncured blends was obtained. The blends containing the epoxy functionalized polymer showed some liquid–liquid transitions in the rheological traces, probably because of the phase separation phenomena. POLYM. ENG. SCI., 46:1502–1511, 2006. © 2006 Society of Plastics Engineers