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Toughening of epoxy resins with thermoplastics. Ii. Tetrafunctional epoxy resin‐polyetherimide blends
Author(s) -
Hourston Douglas J.,
Lane Jaqueline M.,
Macbeath Nigel A.
Publication year - 1991
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990260104
Subject(s) - polyetherimide , epoxy , materials science , composite material , thermoplastic , toughening , scanning electron microscope , thermosetting polymer , phase (matter) , copolymer , polymer , chemistry , organic chemistry , toughness
A series of blends has been prepared by adding a polyetherimide (PEI), in varying proportions, to a tetrafunctional epoxy resin, tetraglycidyl‐diaminodiphenylmethane (TGDDM), cured with 4,4′‐diaminodiphenylsulphone (DDS). All the materials exhibited two‐phase morphologies which were characterised by dynamic mechanical thermal analysis and scanning electron microscopy. Addition of the thermoplastic gave a modest improvement in fracture properties ( K 1c and G 1c ), as determined by three‐point bending experiments, although no obvious correlation with the marked morphological changes was observed.