Title :
Effect of organo-Montmorillonite dispersion on properties of epoxy resin nanocomposites
Author :
Guo, Ning ; Gao, Junguo ; Zhang, Mingyan ; Lu, Zelun ; Zhang, Xiaohong
Author_Institution :
Key Lab. of Eng. Dielectric & Its Applic., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
Montmorillonite modified with alkyl ammonium ions was dispersed in an epoxy/methyl nadic anhydride systems to form epoxy/organo-montmorillonite (oMMT) nanocomposites. Different systems of epoxy montmorillonite nanocomposites materials were prepared by mixing at different temperature before curing. These systems were characterized by X-ray diffraction (XRD), scanning electric microscopy (SEM) and atomic force microscopy (AFM). The results of XRD illustrated that montmorillonite was exfoliated and independent upon the mixing temperature. AFM image showed a uniform dispersion of montmorillonite in the resulting nanocomposites. The results of impact and heat distortion temperature test showed that mixing temperature effected the impact and thermal properties and showed a maximum at 90degC. Compared with pristine epoxy, the impact strength and distortion temperature of the nanocomposites as prepared by mixing at 90degC before curing was simultaneously improved, 31.6% and 14degC, respectively. Morphology of fracture face of the epoxy nanocomposites was investigated by means of SEM imagines. The toughening mechanisms was also analyzed and speculated.
Keywords :
X-ray diffraction; atomic force microscopy; curing; filled polymers; fracture; impact strength; mixing; nanocomposites; nanofabrication; scanning electron microscopy; AFM; SEM; X-ray diffraction; XRD; alkyl ammonium ions; atomic force microscopy; curing; epoxy resin nanocomposites; epoxy-methyl nadic anhydride systems; epoxy-organo-montmorillonite nanocomposites; fracture; heat distortion temperature test; impact strength; mixing temperature; organo-montmorillonite dispersion; pristine epoxy; scanning electric microscopy; temperature 14 degC; temperature 90 degC; toughening mechanisms; Atomic force microscopy; Curing; Dispersion; Epoxy resins; Nanocomposites; Scanning electron microscopy; Temperature; X-ray diffraction; X-ray imaging; X-ray scattering; epoxy; montmorillonite; nanocomposites; toughness;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252220
