6533b861fe1ef96bd12c4da3
RESEARCH PRODUCT
Reactive blending of functionalized acrylic rubbers and epoxy resins
J. T. CarterGiuseppe SpadaroP. T. McgrailClelia Dispenzasubject
Materials Chemistry2506 Metals and AlloysPolymers and PlasticMaterials sciencePolymers and PlasticsComposite numbertechnology industry and agricultureGeneral ChemistryEpoxyMiscibilitychemistry.chemical_compoundMethacrylic acidchemistryNatural rubberCompoundingvisual_artMaterials Chemistryvisual_art.visual_art_mediumChemical Engineering (all)Composite materialAcrylonitrileCuring (chemistry)description
A high molecular weight acrylonitrile/butadiene/methacrylic acid (Nipol 1472) rubber is chosen to control processability and mechanical properties of a TGDDM (tetra glycidyl diphenyl methane) based epoxy resin formulation for aerospace composite applications. The physical blend of rubber and epoxy resin, achieved by dissolution of all the components in a common solvent, forms a heterogeneous system after solvent removal and presents coarse phase separation during cure that impairs any practical relevance of this material. A marked improvement of rubber-epoxy miscibility is achieved by reactive blending ('pre-reaction') the epoxy oligomer with the functional groups present in the rubber. The epoxy-rubber 'adduct' so obtained appears as a homogeneous system at room temperature and also after compounding with the curing agent. Depending on the nature and extent of interactions developed between the rubber and the epoxy resin during 'pre-reaction,' materials with different resin flow characteristics, distinctive morphologies and mechanical properties after curing were obtained. The effect of 'pre-reaction' on the resin cure reaction kinetics has been also investigated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-09-01 | Polymer Engineering & Science |