Thermomechanical and morphological properties of epoxy resins modified with functionalized hyperbranched polyester

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...

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Bibliographic Details
Published in:Polymer engineering and science 2006-11, Vol.46 (11), p.1502-1511
Main Authors: Blanco, I., Cicala, G., Faro, C. Lo, Motta, O., Recca, G.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical properties
Dendrimers
Epoxy resins
Exact sciences and technology
Materials science
Mechanical properties
Polyesters
Polymer industry, paints, wood
Polymers
Properties and testing
Rheology
Technology of polymers
Thermal properties
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Summary: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
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.20604