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Hydrodynamic Effect on Secondary Phase Separation in an Epoxy Resin Modified with Polyethersulfone
Author(s) -
Tang Xiaolin,
Zhang Linxia,
Wang Tao,
Yu Yingfeng,
Gan Wenjun,
Li Shanjun
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400188
Subject(s) - epoxy , scanning electron microscope , materials science , phase (matter) , optical microscope , morphology (biology) , composite material , polymer blend , chemical engineering , viscoelasticity , copolymer , polymer chemistry , polymer , chemistry , organic chemistry , biology , engineering , genetics
Summary: The evolution of the morphologies in blends of epoxy/4,4′‐methylenebis(2,6‐dimethylaniline)/polyethersulfone was followed by time‐resolved light scattering, optical microscopy and scanning electron microscopy. The results suggest that, once the diffusion of epoxy molecules cannot follow the geometrical growth, a secondary phase separation occurs, even in the droplet morphology, in which the size of the epoxy‐rich domain grows as usual. The viscoelastic effect of polyethersulfone is also discussed.Development of morphologies followed by OM: bicontinuous phase separation in the PES‐15.9 blend cured at 140 °C after 80 s.