Effect of SiO2 particles on dispersion of montmorillonite (MMT) in polyimide nanocomposite during thermal imidization

Effect of SiO2 particles on dispersion of montmorillonite (MMT) in polyimide nanocomposite during... In this research, the effect of SiO2 particles on the dispersion behavior of montmorillonite (MMT) in polyimide(4-APS/BTDA)/SiO2–MMT nanocomposite film(where 4-APS is 4-aminophenyl sulfone and BTDA is 3,3′,4,4′-benzophenonetetracarboxylic dianhydride), and the changes in the molecular structure and morphology of the polymer matrix during thermal imidization were characterized by means of temporal analyses. For this purpose, the X-ray diffraction (XRD) patterns of PI/MMT and PI/SiO2–MMT nanocomposite films prepared at different heating steps under ambient atmosphere were studied. The MMT d-spacing in the polymer matrix was determined using Bragg’s equation. The XRD results showed that modified organophilic MMT (OMMT) is initially exfoliated in the poly(amic acid) for both nanocomposite films. The results showed that, with increasing temperature and duration of thermal imidization, the peak of the MMT layers moved to slightly higher angle and also the peak intensity increased concurrently for both nanocomposite films. Comparison of the temporal XRD patterns of PI/MMT and PI/SiO2–MMT nanocomposite films revealed that the increase in the peak intensity as well as the displacement of the peak position of MMT layers were less for the latter film. Indeed, the obtained results indicated that, in the presence of SiO2 particles, there was more dispersion of MMT layers in the polymer matrix. The morphology of all the specimens was investigated by atomic force microscopy. The obtained results showed that presence of SiO2 particles can cause the surface of nanocomposite film to become smoother. The temporal ultraviolet–visible spectra of both nanocomposite films showed a bathochromic shift with increase of the thermal treatment temperature and duration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Effect of SiO2 particles on dispersion of montmorillonite (MMT) in polyimide nanocomposite during thermal imidization

Loading next page...
 
/lp/springer_journal/effect-of-sio2-particles-on-dispersion-of-montmorillonite-mmt-in-JjtzdCPtLR
Publisher
Springer Netherlands
Copyright
Copyright © 2013 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-013-1301-2
Publisher site
See Article on Publisher Site

Abstract

In this research, the effect of SiO2 particles on the dispersion behavior of montmorillonite (MMT) in polyimide(4-APS/BTDA)/SiO2–MMT nanocomposite film(where 4-APS is 4-aminophenyl sulfone and BTDA is 3,3′,4,4′-benzophenonetetracarboxylic dianhydride), and the changes in the molecular structure and morphology of the polymer matrix during thermal imidization were characterized by means of temporal analyses. For this purpose, the X-ray diffraction (XRD) patterns of PI/MMT and PI/SiO2–MMT nanocomposite films prepared at different heating steps under ambient atmosphere were studied. The MMT d-spacing in the polymer matrix was determined using Bragg’s equation. The XRD results showed that modified organophilic MMT (OMMT) is initially exfoliated in the poly(amic acid) for both nanocomposite films. The results showed that, with increasing temperature and duration of thermal imidization, the peak of the MMT layers moved to slightly higher angle and also the peak intensity increased concurrently for both nanocomposite films. Comparison of the temporal XRD patterns of PI/MMT and PI/SiO2–MMT nanocomposite films revealed that the increase in the peak intensity as well as the displacement of the peak position of MMT layers were less for the latter film. Indeed, the obtained results indicated that, in the presence of SiO2 particles, there was more dispersion of MMT layers in the polymer matrix. The morphology of all the specimens was investigated by atomic force microscopy. The obtained results showed that presence of SiO2 particles can cause the surface of nanocomposite film to become smoother. The temporal ultraviolet–visible spectra of both nanocomposite films showed a bathochromic shift with increase of the thermal treatment temperature and duration.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jul 13, 2013

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from Google Scholar, PubMed
Create lists to organize your research
Export lists, citations
Access to DeepDyve database
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off