Premium
Chemically induced phase separated morphologies in epoxy resin‐hyperbranched polymer blends
Author(s) -
Mezzenga Raffaele,
Boogh Louis,
Pettersson Bo,
Månson JanAnders E.
Publication year - 2000
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200001)149:1<17::aid-masy17>3.0.co;2-o
Subject(s) - epoxy , materials science , polymer blend , morphology (biology) , polymer , phase (matter) , homogeneous , scanning electron microscope , chemical engineering , copolymer , polymer chemistry , composite material , chemistry , organic chemistry , thermodynamics , physics , biology , engineering , genetics
The morphology build‐up in toughened epoxy blends using reactive hyperbranched dendritic polymers (HBP) and amine‐cured epoxy resins has been investigated in the present work. By changing the processing conditions or the surface chemistry of the modifier, very different morphologies can be obtained, ranging from homogeneous blends to coarse two‐phase systems. The morphology characterised by electron and optical microscopy has been interpreted combining constitutive equations for phase separation and thermodynamic modelling of phase interactions. The latter model, based on the Flory‐Huggins lattice theory, was modified in order to take into account the addition reactivity of the HBP modifiers. This approach proved successful and can be used as a tool for final morphology prediction in any reactive blend formulation.