Premium
Relationship between gelation and morphology of rubber‐modified epoxy resins
Author(s) -
Pucciariello Rachele,
Villani Vincenzo,
Bianchi Nadia,
Braglia Roberto
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.4990260203
Subject(s) - epoxy , materials science , toughness , natural rubber , composite material , elastomer , morphology (biology) , rheology , toughening , transmission electron microscopy , copolymer , scanning electron microscope , polymer , nanotechnology , genetics , biology
The addition of both a solid and a liquid rubber to an epoxy resin has been shown to strongly increase the toughness of the material. Moreover, it is well known that toughening depends on the morphology of the system, which, in turn, depends on the cure conditions. In the present work the morphologies of epoxy resins modified with mixtures of solid and liquid rubbers have been studied through transmission electron microscopy. An investigation of the influence of the elastomers and of the gel time on the morphology of the hardened material was carried out. Gel times were evaluated, through rheological measurements, at different cure temperatures.