Premium
Mechanical and morphological properties of epoxy resins modified by poly(phthalazinone ether sulfone ketone)
Author(s) -
Xu Yajuan,
Liao Gongxiong,
Gu Tiesheng,
Zheng Liang,
Jian Xigao
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28741
Subject(s) - diglycidyl ether , materials science , epoxy , differential scanning calorimetry , sulfone , composite material , ether , thermoplastic , fracture toughness , scanning electron microscope , heat deflection temperature , ketone , glass transition , polymer chemistry , izod impact strength test , polymer , bisphenol a , chemistry , ultimate tensile strength , organic chemistry , physics , thermodynamics
Abstract A series of blends have been prepared by adding a novel thermoplastic poly(phthalazinone ether sulfone ketone) (PPESK) in varying proportions to diglycidyl ether of bisphenol A epoxy resin (DGEBA) cured with p ‐diaminodiphenylsulfone (DDS). All the blends showed two‐phase structures characterized by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Addition of the PPESK resulted in great enhancement of glass transition temperatures ( T g ) both in the epoxy‐rich phase and in the PPESK‐rich phase by reason of the special structure of PPESK. There was moderate increase in the fracture toughness as estimated by impact strength. Fracture mechanisms such as crack deflection and branches, ductile microcracks, ductile tearing of the thermoplastic, and local plastic deformation of the matrix were responsible for the increase in the fracture toughness of the blends. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008