TY - JOUR
T1 - Intercalation and exfoliation of clay nanoplatelets in epoxy-based nanocomposites
T2 - TEM and XRD observations
AU - Miyagawa, Hiroaki
AU - Drzal, Lawrence T.
AU - Miyagawa, Hiroaki
AU - Carsello, Jerrold A.
PY - 2006/4/1
Y1 - 2006/4/1
N2 - Diglycidyl ether of bisphenol A (DGEBA) and diglycidyl ether of bisphenol F (DGEBF) reinforced with organo-montmorillonite clay nanoplatelets were investigated using anhydride- and amine-curing agents. The sonication technique was used to process epoxy/clay nanocomposites. The basal spacing of clay nanoplatelets was observed by wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS) techniques, and transmission electron microscopy. It was found that the basal spacing of clay nanoplatelets in epoxy matrix was expanded after mixing with either DGEBA/DGEBF or methyltetrahydrophthalic-anhydride (MTHPA) curing agent. The sonication technique provided larger d-spacing of clay nanoplatelets. Because of the different curing temperatures, MTHPA-cured epoxy/clay nanocomposites produced more expanded d-spacing of clay nanoplatelets modified with methyl, tallow, bis(2-hydroxyethyl) quaternary ammonium (MT2EtOH) than triethylenetetraminecured nanocomposites. Depending on the selection of curing agent and organic modification for clay nanoplatelets, the d-spacing was expanded to be up to 8.72 nm.
AB - Diglycidyl ether of bisphenol A (DGEBA) and diglycidyl ether of bisphenol F (DGEBF) reinforced with organo-montmorillonite clay nanoplatelets were investigated using anhydride- and amine-curing agents. The sonication technique was used to process epoxy/clay nanocomposites. The basal spacing of clay nanoplatelets was observed by wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS) techniques, and transmission electron microscopy. It was found that the basal spacing of clay nanoplatelets in epoxy matrix was expanded after mixing with either DGEBA/DGEBF or methyltetrahydrophthalic-anhydride (MTHPA) curing agent. The sonication technique provided larger d-spacing of clay nanoplatelets. Because of the different curing temperatures, MTHPA-cured epoxy/clay nanocomposites produced more expanded d-spacing of clay nanoplatelets modified with methyl, tallow, bis(2-hydroxyethyl) quaternary ammonium (MT2EtOH) than triethylenetetraminecured nanocomposites. Depending on the selection of curing agent and organic modification for clay nanoplatelets, the d-spacing was expanded to be up to 8.72 nm.
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U2 - 10.1002/pen.20477
DO - 10.1002/pen.20477
M3 - Article
AN - SCOPUS:33645682394
SN - 0032-3888
VL - 46
SP - 452
EP - 463
JO - Polymer Engineering and Science
JF - Polymer Engineering and Science
IS - 4
ER -