Advanced

Quantifying Dispersion in Graphene Oxide/Reactive Benzoxazine Monomer Nanocomposites

Rodriguez Arza, Carlos LU ; Ishida, Hatsuo and Maurer, Frans LU (2014) In Macromolecules 47(11). p.3685-3692
Abstract
Two structurally different bisbenzoxazine monomers (tBP-oda and tBP-jeff(148)) are synthesized and reinforced with graphene oxide (GO) at concentrations ranging from 0.25 to 3 wt %. Successful synthesis of the benzoxazine monomer and conversion from graphite to GO are verified by proton nuclear magnetic resonance spectroscopy (H-1 NMR), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD), respectively. Dispersibility of GO in the benzoxazine monomers prior to polymerization is studied using rheological analysis, and quantified according to the theory of fractal model of colloidal gels. The polymerization behavior of the GO/benzoxazine mixtures is studied by both differential scanning calorimetry (DSC) and dynamic... (More)
Two structurally different bisbenzoxazine monomers (tBP-oda and tBP-jeff(148)) are synthesized and reinforced with graphene oxide (GO) at concentrations ranging from 0.25 to 3 wt %. Successful synthesis of the benzoxazine monomer and conversion from graphite to GO are verified by proton nuclear magnetic resonance spectroscopy (H-1 NMR), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD), respectively. Dispersibility of GO in the benzoxazine monomers prior to polymerization is studied using rheological analysis, and quantified according to the theory of fractal model of colloidal gels. The polymerization behavior of the GO/benzoxazine mixtures is studied by both differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Rheological analysis is also applied to the nanocomposite precursors. Better dispersions are achieved using tBP-oda, the benzoxazine with a high degree of aromaticity in its chemical structure. The addition of GO exhibits a negative effect on the polymerization of the two benzoxazines. The mechanical properties and the glass transition temperature T-g of GO/poly(tBP-oda) nanocomposites increases, whereas for the GO/poly(tBP-jeffi(148)) nanocomposites, the mechanical properties are moderately enhanced and T-g is reduced as a function of the GO concentration. The modifications of the mechanical and thermal properties of the nanocomposites are mainly attributed to the degree of dispersion of the GO nanosheets. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Macromolecules
volume
47
issue
11
pages
3685 - 3692
publisher
The American Chemical Society
external identifiers
  • wos:000337199000018
  • scopus:84902159411
ISSN
0024-9297
DOI
10.1021/ma500334j
language
English
LU publication?
yes
id
8c5db454-44cb-4369-bb82-3173f0257b36 (old id 4539169)
date added to LUP
2014-07-16 15:36:12
date last changed
2017-10-29 03:03:57
@article{8c5db454-44cb-4369-bb82-3173f0257b36,
  abstract     = {Two structurally different bisbenzoxazine monomers (tBP-oda and tBP-jeff(148)) are synthesized and reinforced with graphene oxide (GO) at concentrations ranging from 0.25 to 3 wt %. Successful synthesis of the benzoxazine monomer and conversion from graphite to GO are verified by proton nuclear magnetic resonance spectroscopy (H-1 NMR), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD), respectively. Dispersibility of GO in the benzoxazine monomers prior to polymerization is studied using rheological analysis, and quantified according to the theory of fractal model of colloidal gels. The polymerization behavior of the GO/benzoxazine mixtures is studied by both differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Rheological analysis is also applied to the nanocomposite precursors. Better dispersions are achieved using tBP-oda, the benzoxazine with a high degree of aromaticity in its chemical structure. The addition of GO exhibits a negative effect on the polymerization of the two benzoxazines. The mechanical properties and the glass transition temperature T-g of GO/poly(tBP-oda) nanocomposites increases, whereas for the GO/poly(tBP-jeffi(148)) nanocomposites, the mechanical properties are moderately enhanced and T-g is reduced as a function of the GO concentration. The modifications of the mechanical and thermal properties of the nanocomposites are mainly attributed to the degree of dispersion of the GO nanosheets.},
  author       = {Rodriguez Arza, Carlos and Ishida, Hatsuo and Maurer, Frans},
  issn         = {0024-9297},
  language     = {eng},
  number       = {11},
  pages        = {3685--3692},
  publisher    = {The American Chemical Society},
  series       = {Macromolecules},
  title        = {Quantifying Dispersion in Graphene Oxide/Reactive Benzoxazine Monomer Nanocomposites},
  url          = {http://dx.doi.org/10.1021/ma500334j},
  volume       = {47},
  year         = {2014},
}